Coding Art: Inspired by Sol LeWitt

Code:

var xspacing = 0.1; // Distance between each horizontal location
var w; // Width of entire wave
var theta = 0.0; // Start angle at 0
var amplitude = 40.0; // Height of wave
var period = 500.0; // How many pixels before the wave repeats
var dx; // Value for incrementing x
var yvalues; // Using an array to store height values for the wave

function setup() {
 createCanvas(400, 400);
 w = width+16;
 dx = (TWO_PI / period) * xspacing;
 yvalues = new Array(floor(w/xspacing));
}

function draw() {
 background(50,100,200);
 calcWave();
 renderWave();
}

function calcWave() {
 // Increment theta (try different values for 
 // ‘angular velocity’ here)
 theta += 0.02;

// For every x value, calculate a y value with sine function
 var x = theta;
 for (var i = 0; i < yvalues.length; i++) {
 yvalues[i] = sin(x)*amplitude;
 x+=dx;
 }
}

function renderWave() {
 noStroke();
 fill(255,0,0);
 // A simple way to draw the wave with an ellipse at each location
 for (var x = 0; x < yvalues.length; x++) {
 rect(x*xspacing, height/2+yvalues[x], 1, 300);
 }
}