Simplistic MyCanvas Example

var canvas1, canvas2;
function setup() {
  canvas1 = createMyCanvas(300, 170);
  canvas1.fill(255, 0, 0);
  canvas2 = createMyCanvas(300, 200);
  canvas2.stroke(255, 0, 255);
}
function draw() {
  canvas1.background("FloralWhite");
  canvas1.rect(canvas1.mouseX, canvas1.mouseY,  200 ,80);
  canvas2.background("Khaki");
  canvas2.line(canvas2.mouseX, canvas2.mouseY, 250, 120);
}

Drag your mouse though the canvases.

James Brink, 5/12/2020