var x = 10; 

​

function setup() {

  createCanvas(400, 400);

  textSize(32);

}

​

function draw(){

  background(240);

  text('Hey', 10, 30);

  fill(0, 102, 153);

  text(who+'!', x, 80);

  x+=1;

  if(x>=width-30){

    x=10;

  }

}

​

//text takes 3 arguments

//first - what to print/show

//second, third - x, y coordinate

//by making any of the arguments a variable you can change/animate the text eg. displaying the length of an array