var last=0,valset = 2000;

​

function setup() {

  createCanvas(400, 400); 

  fill(200,0,0);

  noStroke();

  slider = createSlider(0, 2000, 1000, 50);

  //slider.position(10, 10);

  slider.style('width', '120px');

}

​

function draw() {

  background(0);

  if ( showit ) circle(200,200,100);

  mytimer();

}

​

function mytimer() {

  valset = slider.value();

  //print("valset "+valset);

  if ( millis() > last + valset ) { 

    showit = ! showit;

    last += valset;

    print("showit "+showit+" valset "+valset);

  }

}