int[] rows = new int[5];
	int[] rowsA = new int[5];
	int[] rowsB = new int[5];
	boolean waves = true;
	int add = 1;
	int maxAdd = 10;
	
	void setup() {
		framerate(10);
		size(120,120);
		rows[0] = 1;
		rows[1] = 1;
		rows[2] = 1;
		rows[3] = 1;
		rows[4] = 1;

		rowsA[0] = 1;
		rowsA[1] = 1;
		rowsA[2] = 1;
		rowsA[3] = 1;
		rowsA[4] = 1;

		rowsB[0] = (int)pow(2,3);
		rowsB[1] = (int)pow(2,4);
		rowsB[2] = (int)pow(2,4);
		rowsB[3] = (int)pow(2,3);
		rowsB[4] = (int)pow(2,2);

	}
	
	void draw() {
		background(200);
	
		for(int i = 0; i < rows.length; i++) {
			for(int j = 0; j < rows.length; j++) {
				if((rows[i] & (int)pow(2,j)) != 0) {
					fill(255,255,255);
					rect(100-20*j,20*i,20,20);
				}
			}
		}
		if(waves)
			iterateSin();
		else
			iterate();
		
	}
	
	void iterate() {
		rows[0] = rows[1];
		rows[1] = rows[2];
		rows[2] = rows[3];
		rows[3] = rows[4];
		rows[4] = rows[4] + add;
		// good numbers are 2
	}
	
	void iterateSin() {
		// seed row[4] and row[3]
		// group A
		rowsA[0] = rowsA[1];
		rowsA[1] = rowsA[2];
		rowsA[2] = rowsA[3];
		for(int i = 3; i <= 4; i++) {
			if((rowsA[i-1] & (int)pow(2,0)) != 0) { // if zero bit of previous row is on
				if((rowsA[i-2] & (int)pow(2,0)) != 0) {
					rowsA[i] = (int)pow(2,1);
				}
				else {
					rowsA[i] = (int)pow(2,0);
				}
			}
			else if((rowsA[i-1] & (int)pow(2,4)) != 0) { // if max bit of previous row is on
				if((rowsA[i-2] & (int)pow(2,4)) != 0) {
					rowsA[i] = (int)pow(2,3);
				}
				else {
					rowsA[i] = (int)pow(2,4);
				}
			}
			else if(rowsA[i-2] > rowsA[i-1]) {
				rowsA[i] = rowsA[i-1] >> 1;
			}
			else {
				rowsA[i] = rowsA[i-1] << 1;
			}
		}
		
		
		// group B
		rowsB[0] = rowsB[1];
		rowsB[1] = rowsB[2];
		rowsB[2] = rowsB[3];
		for(int i = 3; i <= 4; i++) {
			if((rowsB[i-1] & (int)pow(2,0)) != 0) { // if zero bit of previous row is on
				if((rowsB[i-2] & (int)pow(2,0)) != 0) {
					rowsB[i] = (int)pow(2,1);
				}
				else {
					rowsB[i] = (int)pow(2,0);
				}
			}
			else if((rowsB[i-1] & (int)pow(2,4)) != 0) { // if max bit of previous row is on
				if((rowsB[i-2] & (int)pow(2,4)) != 0) {
					rowsB[i] = (int)pow(2,3);
				}
				else {
					rowsB[i] = (int)pow(2,4);
				}
			}
			else if(rowsB[i-2] > rowsB[i-1]) {
				rowsB[i] = rowsB[i-1] >> 1;
			}
			else {
				rowsB[i] = rowsB[i-1] << 1;
			}
		}
		for(int i = 0; i < rows.length; i++) {
			rows[i] = rowsA[i] | rowsB[i];
		}
	}
	
	void mousePressed() {
		if(waves) {
			waves = false;
			add = 1;
		}
		else {
			if(add < maxAdd) {
				add++;
			}
			else {
				waves = true;
				add = 1;
			}
		}
		setup();
	}