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import { paint } from './canvas.js';
const { fromEvent } = Rx.Observable;
const { takeUntil, mergeMap } = Rx.operators;
const move$ = fromEvent(document, 'mousemove')
const down$ = fromEvent(document, 'mousedown')
const up$ = fromEvent(document, 'mouseup')
const paints$ = down$.pipe(
mergeMap(down => move$)
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