diff --git a/src/App.tsx b/src/App.tsx
index 09845bd0e..180fe3363 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -15,6 +15,10 @@ import {
 } from './editor/highlightextension'
 import { useStore } from './useStore'
 import { isOverlapping } from './lib/utils'
+import { Toolbar } from './Toolbar'
+import { BasePlanes } from './components/BasePlanes'
+import { SketchPlane } from './components/SketchPlane'
+import { Logs } from './components/Logs'
 
 const _code = `sketch mySketch {
   path myPath = lineTo(0,1)
@@ -29,15 +33,25 @@ const OrrthographicCamera = OrthographicCamera as any
 function App() {
   const cam = useRef()
   const [code, setCode] = useState(_code)
-  const { editorView, setEditorView, setSelectionRange, selectionRange } =
-    useStore(
-      ({ editorView, setEditorView, setSelectionRange, selectionRange }) => ({
-        editorView,
-        setEditorView,
-        setSelectionRange,
-        selectionRange,
-      })
-    )
+  const {
+    editorView,
+    setEditorView,
+    setSelectionRange,
+    selectionRange,
+    guiMode,
+    setGuiMode,
+    removeError,
+    addLog,
+  } = useStore((s) => ({
+    editorView: s.editorView,
+    setEditorView: s.setEditorView,
+    setSelectionRange: s.setSelectionRange,
+    selectionRange: s.selectionRange,
+    guiMode: s.guiMode,
+    setGuiMode: s.setGuiMode,
+    removeError: s.removeError,
+    addLog: s.addLog,
+  }))
   // const onChange = React.useCallback((value: string, viewUpdate: ViewUpdate) => {
   const onChange = (value: string, viewUpdate: ViewUpdate) => {
     setCode(value)
@@ -60,9 +74,21 @@ function App() {
   >([])
   useEffect(() => {
     try {
+      if (!code) {
+        setGeoArray([])
+        removeError()
+        return
+      }
       const tokens = lexer(code)
       const ast = abstractSyntaxTree(tokens)
-      const programMemory = executor(ast)
+      const programMemory = executor(ast, {
+        root: {
+          log: (a: any) => {
+            addLog(a)
+          },
+        },
+        _sketch: [],
+      })
       const geos: { geo: BufferGeometry; sourceRange: [number, number] }[] =
         programMemory.root.mySketch
           .map(
@@ -76,14 +102,18 @@ function App() {
           )
           .filter((a: any) => !!a.geo)
       setGeoArray(geos)
+      removeError()
       console.log(programMemory)
-    } catch (e) {
+    } catch (e: any) {
+      setGuiMode({ mode: 'codeError' })
       console.log(e)
+      addLog(e)
     }
   }, [code])
   return (
     <div className="h-screen">
       <Allotment>
+        <Logs />
         <div className="bg-red h-full">
           <CodeMirror
             value={_code}
@@ -96,36 +126,44 @@ function App() {
         </div>
         <div className="h-full">
           viewer
-          <div className="border h-full border-gray-300">
-            <Canvas>
-              <OrbitControls
-                enableDamping={false}
-                enablePan
-                enableRotate
-                enableZoom
-                reverseOrbit={false}
-              />
-              <OrrthographicCamera
-                ref={cam}
-                makeDefault
-                position={[0, 0, 10]}
-                zoom={40}
-                rotation={[0, 0, 0]}
-              />
-              <ambientLight />
-              <pointLight position={[10, 10, 10]} />
-              {geoArray.map(
-                (
-                  {
-                    geo,
-                    sourceRange,
-                  }: { geo: BufferGeometry; sourceRange: [number, number] },
-                  index
-                ) => (
-                  <Line key={index} geo={geo} sourceRange={sourceRange} />
-                )
-              )}
-            </Canvas>
+          <Toolbar />
+          <div className="border h-full border-gray-300 relative">
+            <div className="absolute inset-0">
+              <Canvas>
+                <OrbitControls
+                  enableDamping={false}
+                  enablePan
+                  enableRotate
+                  enableZoom
+                  reverseOrbit={false}
+                />
+                <OrrthographicCamera
+                  ref={cam}
+                  makeDefault
+                  position={[0, 0, 10]}
+                  zoom={40}
+                  rotation={[0, 0, 0]}
+                />
+                <ambientLight />
+                <pointLight position={[10, 10, 10]} />
+                {geoArray.map(
+                  (
+                    {
+                      geo,
+                      sourceRange,
+                    }: { geo: BufferGeometry; sourceRange: [number, number] },
+                    index
+                  ) => (
+                    <Line key={index} geo={geo} sourceRange={sourceRange} />
+                  )
+                )}
+                <BasePlanes />
+                <SketchPlane />
+              </Canvas>
+            </div>
+            {guiMode.mode === 'codeError' && (
+              <div className="absolute inset-0 bg-gray-700/20">yo</div>
+            )}
           </div>
         </div>
       </Allotment>
diff --git a/src/Toolbar.tsx b/src/Toolbar.tsx
new file mode 100644
index 000000000..9bd364341
--- /dev/null
+++ b/src/Toolbar.tsx
@@ -0,0 +1,27 @@
+import { useStore } from './useStore'
+
+export const Toolbar = () => {
+  const { setGuiMode, guiMode } = useStore(({ guiMode, setGuiMode }) => ({
+    guiMode,
+    setGuiMode,
+  }))
+  return (
+    <div>
+      {guiMode.mode === 'default' && (
+        <button
+          onClick={() => {
+            setGuiMode({
+              mode: 'sketch',
+              sketchMode: 'selectFace',
+            })
+          }}
+        >
+          Start sketch
+        </button>
+      )}
+      {guiMode.mode !== 'default' && (
+        <button onClick={() => setGuiMode({ mode: 'default' })}>exit</button>
+      )}
+    </div>
+  )
+}
diff --git a/src/components/BasePlanes.tsx b/src/components/BasePlanes.tsx
new file mode 100644
index 000000000..b1ec89dde
--- /dev/null
+++ b/src/components/BasePlanes.tsx
@@ -0,0 +1,74 @@
+import { useState } from 'react'
+import { DoubleSide } from 'three'
+import { useStore } from '../useStore'
+import { Intersection } from '@react-three/fiber'
+
+const opacity = 0.1
+
+export const BasePlanes = () => {
+  const [axisIndex, setAxisIndex] = useState<null | number>(null)
+  const { setGuiMode, guiMode } = useStore(({ guiMode, setGuiMode }) => ({
+    guiMode,
+    setGuiMode,
+  }))
+
+  const onPointerEvent = ({
+    intersections,
+  }: {
+    intersections: Intersection[]
+  }) => {
+    if (!intersections.length) {
+      setAxisIndex(null)
+      return
+    }
+    let closestIntersection = intersections[0]
+    intersections.forEach((intersection) => {
+      if (intersection.distance < closestIntersection.distance)
+        closestIntersection = intersection
+    })
+    const smallestIndex = Number(closestIntersection.eventObject.name)
+    setAxisIndex(smallestIndex)
+  }
+  const onClick = () => {
+    if (guiMode.mode !== 'sketch') {
+      return null
+    }
+    if (guiMode.sketchMode !== 'selectFace') {
+      return null
+    }
+    setGuiMode({
+      mode: 'sketch',
+      sketchMode: 'points',
+      axis: axisIndex === 0 ? 'yz' : axisIndex === 1 ? 'xy' : 'xz',
+    })
+  }
+  if (guiMode.mode !== 'sketch') {
+    return null
+  }
+  if (guiMode.sketchMode !== 'selectFace') {
+    return null
+  }
+  return (
+    <>
+      {Array.from({ length: 3 }).map((_, index) => (
+        <mesh
+          key={index}
+          rotation-x={index === 1 ? -Math.PI / 2 : 0}
+          rotation-y={index === 2 ? -Math.PI / 2 : 0}
+          onPointerMove={onPointerEvent}
+          onPointerOut={onPointerEvent}
+          onClick={onClick}
+          name={`${index}`}
+        >
+          <planeGeometry args={[5, 5]} />
+          <meshStandardMaterial
+            color="blue"
+            side={DoubleSide}
+            transparent
+            opacity={opacity + (axisIndex === index ? 0.3 : 0)}
+          />
+        </mesh>
+      ))}
+    </>
+  )
+}
diff --git a/src/components/Logs.tsx b/src/components/Logs.tsx
new file mode 100644
index 000000000..b0968586e
--- /dev/null
+++ b/src/components/Logs.tsx
@@ -0,0 +1,34 @@
+import { useEffect } from 'react'
+import { useStore } from '../useStore'
+
+export const Logs = () => {
+  const { logs, resetLogs } = useStore(({ logs, resetLogs }) => ({
+    logs,
+    resetLogs,
+  }))
+  useEffect(() => {
+    const element = document.querySelector('.console-tile')
+    if (element) {
+      element.scrollTop = element.scrollHeight - element.clientHeight
+    }
+  }, [logs])
+  return (
+    <div className="h-full relative">
+      <div className="absolute inset-0 flex flex-col items-start">
+        <button onClick={resetLogs}>reset</button>
+        <div className=" overflow-auto h-full console-tile w-full">
+          {logs.map((msg, index) => {
+            return (
+              <pre className="text-xs pl-2 text-sky-600" key={index}>
+                <code style={{ fontFamily: 'monospace' }} key={index}>
+                  <span className="text-gray-400">{'- '}</span>
+                  {String(msg)}
+                </code>
+              </pre>
+            )
+          })}
+        </div>
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/SketchPlane.tsx b/src/components/SketchPlane.tsx
new file mode 100644
index 000000000..599b9961d
--- /dev/null
+++ b/src/components/SketchPlane.tsx
@@ -0,0 +1,25 @@
+import { useStore } from '../useStore'
+
+export const SketchPlane = () => {
+  const { setGuiMode, guiMode } = useStore(({ guiMode, setGuiMode }) => ({
+    guiMode,
+    setGuiMode,
+  }))
+  if (guiMode.mode !== 'sketch') {
+    return null
+  }
+  if (guiMode.sketchMode !== 'points') {
+    return null
+  }
+
+  const ninty = Math.PI / 2
+  const rotation: [number, number, number] = [0, 0, 0]
+  if (guiMode.axis === 'yz') {
+    rotation[0] = ninty
+  } else if (guiMode.axis === 'xy') {
+    rotation[1] = ninty
+  } else if (guiMode.axis === 'xz') {
+    rotation[2] = ninty
+  }
+  return <gridHelper args={[30, 40, 'blue', 'hotpink']} rotation={rotation} />
+}
diff --git a/src/useStore.ts b/src/useStore.ts
index ea6ba030d..c2bd8397c 100644
--- a/src/useStore.ts
+++ b/src/useStore.ts
@@ -3,6 +3,23 @@ import { addLineHighlight, EditorView } from './editor/highlightextension'
 
 export type Range = [number, number]
 
+type GuiModes =
+  | {
+      mode: 'default'
+    }
+  | {
+      mode: 'sketch'
+      sketchMode: 'points'
+      axis: 'xy' | 'xz' | 'yz'
+    }
+  | {
+      mode: 'sketch'
+      sketchMode: 'selectFace'
+    }
+  | {
+      mode: 'codeError'
+    }
+
 interface StoreState {
   editorView: EditorView | null
   setEditorView: (editorView: EditorView) => void
@@ -10,6 +27,13 @@ interface StoreState {
   setHighlightRange: (range: Range) => void
   selectionRange: [number, number]
   setSelectionRange: (range: Range) => void
+  guiMode: GuiModes
+  lastGuiMode: GuiModes
+  setGuiMode: (guiMode: GuiModes) => void
+  removeError: () => void
+  logs: string[]
+  addLog: (log: string) => void
+  resetLogs: () => void
 }
 
 export const useStore = create<StoreState>()((set, get) => ({
@@ -29,4 +53,25 @@ export const useStore = create<StoreState>()((set, get) => ({
   setSelectionRange: (selectionRange) => {
     set({ selectionRange })
   },
+  guiMode: { mode: 'default' },
+  lastGuiMode: { mode: 'default' },
+  setGuiMode: (guiMode) => {
+    const lastGuiMode = get().guiMode
+    set({ guiMode })
+    set({ lastGuiMode })
+  },
+  removeError: () => {
+    const lastGuiMode = get().lastGuiMode
+    const currentGuiMode = get().guiMode
+    if (currentGuiMode.mode === 'codeError') {
+      set({ guiMode: lastGuiMode })
+    }
+  },
+  logs: [],
+  addLog: (log) => {
+    set((state) => ({ logs: [...state.logs, log] }))
+  },
+  resetLogs: () => {
+    set({ logs: [] })
+  },
 }))