/* TODO: Replace these file comments with a description of what your program
* does.
/
import acm.program.;
import acm.graphics.;
import java.awt.;

public class Caterpillar extends GraphicsProgram {
    /* TODO: You are probably going to want to define some program constants here that
     * control the size, number, spacing, and color of the body segments. When you do,
     * delete this comment and replace it with your constants.
     * 
     * Remember to add comments describing what each constant does!
     */ 
    
    
    //Tht radius of the segment circle
    private static final int SEGMENT_RADIUS = 30;
    
    private static final Color fill_color = Color.green;
    private static final Color bound_color = Color.black;
    
    
    //the space of the two near segments
    private static final int space = 40;
    
    //The (x,y) of the left-up coordinate of the first segment.
    private static final int x = 0;
    private static final int y = 30;
    
    private static final int x1 = space;
    private static final int y1 = 0;
    
    private static final int x2 = x1 + space;
    private static final int y2 = y;
    
    private static final int x3 = x2 + space;
    private static final int y3 = 0;
    
    private static final int x4 = x3 + space;
    private static final int y4 = y;
    
    private static final int x5 = x4 + space;
    private static final int y5 = 0;
    

    public void run() {
        createCircle(x,y,SEGMENT_RADIUS*2,SEGMENT_RADIUS*2);
        createCircle(x1,y1,SEGMENT_RADIUS*2,SEGMENT_RADIUS*2);
        createCircle(x2,y2,SEGMENT_RADIUS*2,SEGMENT_RADIUS*2);
        createCircle(x3,y3,SEGMENT_RADIUS*2,SEGMENT_RADIUS*2);
        createCircle(x4,y4,SEGMENT_RADIUS*2,SEGMENT_RADIUS*2);
        createCircle(x5,y5,SEGMENT_RADIUS*2,SEGMENT_RADIUS*2);
    }


    /**
     * create a circle .
     * @param x     The x coordinate of the upper-left corner of the box .
     * @param y     The y coordinate of the upper-left corner of the box .
     * @param width     The width of the box .
     * @param height    The height of the box.
     */
    private void createCircle(int x, int y, int width, int height) {
        
        GOval circle = new GOval(x,y,width,height);
        circle.setFilled(true);
        circle.setFillColor(fill_color);
        circle.setColor(bound_color);
        add(circle);
    }
}