let x = 20;

let msg = 'hello world';

let emptyMsg; // Just declared the variable, name is registered

​

//declare fishes

let fish1;

let fish2;

​

function setup() {

  createCanvas(400, 400);

 // print(x);

  //let msg = 'I am awesome'; //Local Variable; overwrites global variable//

  //print (msg) //in setup

  fish1 = new fish()

  print ('fish1.x -' + fish1.x)

  fish1.name = 'nemo'

  fish1.print ()

  fish2 = new fish()

  print ('fish2.x -' + fish2.x)

  fish2.name = 'sushi'

  fish2.print()

}

​

function draw() {

  background(220);

  print (msg);//global one because there's not a message declared here//

  print(emptyMsg);

  emptyMsg = 'now defined' // do not use let for changing variables mid function

  print(emptyMsg)

  noLoop();

}

​

//fish have a position

class fish{

  constructor(){

    print('constructing a fish');

    this.x = random(0, width)

  }

  print(){

    print (this.name + ' x - ' + this.x)

  }

}