It works

src/sand-painter.ts

@@ -4,8 +4,12 @@ export default class SandPainter {
     private color: number
     private gain: number
 
-    constructor(state: State) {
-        this.color = state.getRandomColor()
+    constructor(color: number) {
+        this.color = color
         this.gain = Math.random() / 10
     }
+
+    render() {
+
+    }
 }