function setup() {

  createCanvas(400, 400);

  //in square brackets, the first number is 0; 11 is in index 0

  let luckyNums = [11,7,17,27,19];

  print(luckyNums[0]);

  print(luckyNums.length); //there's 5 numbers but up to index 4

}

​

function draw() {

  background(0);

}