// Helene Martin, CSE 142
// Displays patterns of stairs using loops

import java.awt.*;

public class Stairs {
	public static void main(String[] args) {
		DrawingPanel p = new DrawingPanel(160, 160);
		Graphics g = p.getGraphics();
		stairs1(g);
	}
	
	// ten stacked rectangles starting at (20, 20), height 10, 
	// width starting at 100 and decreasing by 10 each time
	public static void stairs1(Graphics g) {
		for (int i = 0; i < 10; i++) {
			g.drawRect(20, 20 + 10 * i, 100 - 10 * i, 10);
		}
	}

	// ten stacked rectangles starting at (20, 20), height 10, 
	// width starting at 100 and decreasing by 10 each time
	// each rectangle starting 10pixels right of the last	
	public static void stairs2(Graphics g) {
		for (int i = 0; i < 10; i++) {
			g.drawRect(20 + 10 * i, 20 + 10 * i, 100 - 10 * i, 10);
		}
	}

	/*	
	The topmost rectangle is 10 wide. The bottom one starts at (20, 20) and is 100 wide.
	The rightmost point of the bottom rectangle is 100 + 20 = 120
	The leftmost point of the top rectangle is 120 - 10 = 110
	
	line	starting x			110 + (i * -10)
	0		110
	1		100
	2		90
	*/
	public static void stairs3(Graphics g) {
		for (int i = 0; i < 10; i++) {
			g.drawRect(110 + (i * -10), 20 + 10 * i, 10 + 10 * i, 10);
		}
	}

}