createCanvas(800,800);

  colorMode(HSB,360,100,100,100);

  rectMode(CENTER);

  noStroke();

}

​

function draw() {

  //background(230,30,23);

  let gradient = drawingContext.createLinearGradient(

  width/2-200, height/2-200, width/2+200, height/2+200 );

  gradient.addColorStop(0,color(310,100,100,100));

  gradient.addColorStop(1,color(250,100,100,100));

  drawingContext.fillStyle = gradient;

  rect (width/2,height/2, width, height);

}