let ls = 2;

let colpick;

let lspick;

let clearB;

​

function setup() {

  createCanvas(windowWidth, windowHeight-40);

  colpick = createColorPicker();

  lspick = createSlider(1, 100, 5);

  background(244);

  clearB = createButton("Reset");

  clearB.mousePressed(clearbg);

}

​

function draw() {

  col = colpick.value();

  ls = lspick.value();

  if(mouseIsPressed) {

    stroke(col);

    strokeWeight(ls);

    line(pmouseX, pmouseY, mouseX, mouseY);

  }

}

​

function clearbg() {

  background(244);

}