a very simple terrain generator in p5js

terrain_generator_p5.js

let rows = 16, cols = 9, xStep, yStep;
let c = ['DeepSkyBlue','forestgreen','Sienna','BurlyWood'];

function setup() {
  createCanvas(windowWidth, windowHeight);

  xStep = width/cols;
  yStep = height/rows;


  for (let x = 0; x < width; x+=xStep){
	  for (let y = 0; y < height; y +=yStep){
		stroke(0);
		stroke(150);
		strokeWeight(2);

		let dieroll =  floor(random(c.length));
		fill(color(c[dieroll]));
		rect(x,y, xStep, yStep);
	  }
  }
}