sketch01_b

// exercise: draw random horizontal lines that start at the left border and end at the right border

// creating a variable to hold the y value of the line (the distance from the top)
var y = 0;

function setup() {
  // defining the size of the canvas, in pixels
  createCanvas(900, 600);
  background(50, 100, 150);
  // slowing down the sketch to 5 frames a second
  frameRate(5);
}

function draw() {
  // the whole canvas will be redrawn every frame
  //background(50, 100, 150);
  // stetting the stroke to white: stroke(255,255,255) can be replaced by stroke(255)
  stroke(255);
  // a new random line will be drawn every frame
  //line(random(width), random(height), random(width), random(height));
  // a new random height is being selected every frame
  y = random(height);
  // print y value to the console, just as a test
  println(y);
  // this y value is used for both points in the line statement
  // x1 is set to 0 to have the line start at the left border and x2 to width to have it end at the right border
  line(0, y, width, y);

  // idea: comment out the background statement in the draw() function
  // idea: comment out the frameRate statement in the setup() function or increase its value
  // variation of the exercise: have random vertical lines starting on the top and ending at the bottom

}