reddit

“
final int FRAME_RATE = 30;
final int ARRAY_SIZE = 40;
final int WIDTH = 400;
final int HEIGHT = 250;
float[] datum = new float[ARRAY_SIZE];

float x1 = 0;
float y1 = 0;
float x2 = 0;
float y2 = 0;

float xIncrement = WIDTH/(ARRAY_SIZE-1);
float value;
void setup() {
size(WIDTH, HEIGHT);
frameRate(FRAME_RATE);
colorMode(RGB,255,255,255,100);

for ( int i = 0; i < ARRAY_SIZE; i ++ )
{
datum[i] = (float) Math.random();
}
smooth();
}
void draw() {

strokeWeight(0);
stroke( 0 );

fill(0, 50);
rect(0, 0, width, height);

strokeWeight(2);
stroke( #FFFF00 );

for (int i = 0; i < ARRAY_SIZE-1; i++) {
x1 = i * xIncrement;
y1 = datum[i] * HEIGHT;

x2 = (i+1) * xIncrement;
y2 = datum[i+1] * HEIGHT;

line( x1, y1, x2, y2 );
}

for (int i = 0; i < ARRAY_SIZE-1; i++) {
datum[i] = datum[i+1];
}
value = datum[ARRAY_SIZE-2] + ( (Math.random() > .5) ? 1 : -1)* (float) (Math.random() * .15);
value = (float) Math.max( value, 0 );
value = (float) Math.min( value, 1 );
datum[ARRAY_SIZE-1] = value;
}” source...