SWM

var locs = [];

​

function setup() {

  createCanvas(2300, 1185);

​

  var res = 28;

  var countX = ceil(width/res) + 1;

  var countY = ceil(height/res) + 1;

​

  for (var j = 0; j < countY; j++) {

    for (var i = 0; i < countX; i++) {

      locs.push( new p5.Vector(res*i, res*j) );

    }

  };

​

  noFill();

  stroke(0,170,188);

  strokeWeight(3);

​

//saveFrames("my.png","jpg");

​

}

​

function draw() {

  background(0,32,91);

  for (var i = locs.length - 1; i >= 0; i--) {

    var h = calcVec( locs[i].x - mouseX, locs[i].y - mouseY);

    line(

      locs[i].x, 

      locs[i].y, 

      locs[i].x + 20*cos(h.heading()), 

      locs[i].y + 20*sin(h.heading())

    );

  };

}

​

function calcVec(x, y) {

  return new p5.Vector(y - x, - x - y);

}