let redBGbool = false;

​

​

function setup() {

  createCanvas(400, 400);

  background(0)

}

​

function draw() {

  if(blueBGbool == true){

    blueBG();

  }

  if(redBGbool == true){

    redBG();

  }

}

​

function blueBG(){

  background(0,0,250)

}

​

function redBG(){

  background(250,0,0)

}

​

function keyPressed(){

  if(key == 'q'){

    blueBGbool = true;

   redBGbool = false;

  }

​

  if(key == 'w'){

    blueBGbool = false;

    redBGbool = true;

  }

}