let x = 3;

let y = 0;

let xJump= 2; 

let yJump= 2.1;

​

​

function setup() {

  createCanvas(400, 400);

  background(255);

  frameRate(100); 

    rectMode (CENTER); 

  fill(30,20);

  stroke(5);

}

function draw() {

  colorMode(RGB); 

  fill(

    map(x,0,width,0,200),

    100,

    map(y,0,height,100,300),

    map(mouseX,0,width,0,50),

    map(mouseY,0,height,50,1)

    );

  rect(x, y, 25, 25);

  x = x + xJump;

  y = y + yJump;

​

  if (x > width) {

    xJump = xJump * -1; 

  }

  if (x <= 0) {

    xJump = xJump * -1; 

  }

  if (y > height) {

    yJump = yJump * -1; 

  }

  if (y <= 0) {

    yJump = yJump * -1; 

  }

}

​