function setup() {

  createCanvas(400, 400);

}

​

function draw() {

  background(0);

drawPattern(patternPos);

  patternPos--;

  // patternPos=patternPos-1;

}

​

function drawPattern(yPos){

    for(let x=0;x<width;x+=70){

    for(let yPos=patternPos;yPos<height;yPos+=10){

      noStroke();

      fill(x,yPos,100);

  text('this is a pattern',x,yPos);

   }

  }

}