How To Complete For Loop For Forward Method

I can't figure out how to complete the for loop for the forward method that needs to calculate each pixel on the path setting it to white, starting at location (x,y) and ending at r.

public class Turtle
{
private static BufferedImage img;
private static int black = 0;
private static int blue = 255; // 2^8-1
private static int green = 65280; //(2^8-1)*2^8
private static int red = 16711680; //(2^8-1)*2^16
private static int white = 16777215; // 2^24-1
private double x,y,theta; // what does a Turtle know?
static // a static initializer list

[code]....