​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(220);

  if (mouseX > 0 && mouseX<20){ fill('red')} 

  else {fill ('white')}

​

  rect(0, 0, width / 20, height);

​

  if (mouseX > 20 && mouseX<40){ fill('red')} 

  else {fill ('white')}

​

  rect(20, 0, width / 20, height);

  if (mouseX > 40 && mouseX < 60){ fill('red')} 

  else {fill ('white')}

  rect(40, 0, width / 20, height);

  if (mouseX > 60 && mouseX < 80){ fill('red')}

  else {fill ('white')}

​

  rect(60, 0, width / 20, height);

  if (mouseX > 80 && mouseX < 100){ fill('red')}

  else {fill ('white')}

  rect(80, 0, width / 20, height);

  if (mouseX > 100 && mouseX < 120){ fill('red')}

  else {fill ('white')}

  rect(100, 0, width / 20, height);

  if (mouseX > 120 && mouseX < 140){ fill('red')}

  else {fill ('white')}

  rect(120, 0, width / 20, height);

  if (mouseX > 140 && mouseX < 160){ fill('red')}

  else {fill ('white')}

  rect(140, 0, width / 20, height);

  if (mouseX > 160 && mouseX < 180){ fill('red')}

  else {fill ('white')}

  rect(160, 0, width / 20, height);

  if (mouseX > 180 && mouseX < 200){ fill('red')}

  else {fill ('white')}

  rect(180, 0, width / 20, height);

  if (mouseX > 200 && mouseX < 220){ fill('red')}

  else {fill ('white')}

  rect(200, 0, width / 20, height);

  if (mouseX > 220 && mouseX < 240){ fill('red')}

  else {fill ('white')}

  rect(220, 0, width / 20, height);

  if (mouseX > 240 && mouseX < 260){ fill('red')}

  else {fill ('white')}

  rect(240, 0, width / 20, height);

  if (mouseX > 260 && mouseX < 280){ fill('red')}

  else {fill ('white')}

  rect(260, 0, width / 20, height);

  if (mouseX > 280 && mouseX < 300){ fill('red')}

  else {fill ('white')}

  rect(280, 0, width / 20, height);

  if (mouseX > 300 && mouseX < 320){ fill('red')}

  else {fill ('white')}

  rect(300, 0, width / 20, height);

  if (mouseX > 320 && mouseX < 340){ fill('red')}

  else {fill ('white')}

  rect(320, 0, width / 20, height);

  if (mouseX > 340 && mouseX < 360){ fill('red')}

  else {fill ('white')}

  rect(340, 0, width / 20, height);

  if (mouseX > 360 && mouseX < 380){ fill('red')}

  else {fill ('white')}

  rect(360, 0, width / 20, height);

  if (mouseX > 380){ fill('red')}

  else {fill ('white')}

  rect(380, 0, width / 20, height);

}

​

​