import java.awt.*;
/*  CS111  Fall 2000 
     Lab 2 September 20, 2000
     Drawing a multicolored checkerboard using methods
  	
  	 Wendy Wellesley
  	 CS111
    
    
   */
   
public class BigChecksboard extends BuggleWorld {
	
	int n=15;
	
	public void setup() {
		setDimensions(n,n);
	}
	
	public void run () {
		// create dude who draws the multicolored checkerboard 
		CheckerBuggle dude = new CheckerBuggle();
		dude.drawBoard(); 
	}
}

class CheckerBuggle extends Buggle {
	
	// drawBoard draws the entire board and sets the buggle back to the center of the board
	public void drawBoard(){
		this.drawRow();
		this.moveToNewRow();
		this.drawRow();
		this.moveToNewRow();
		this.drawRow();
		this.moveToCenter();
	}
	
	// moveToCenter moves the buggle from the end of a row to the center of the board
	public void moveToCenter() {
		this.brushUp();
		this.backward(3);
		this.left();
		this.backward(3);
		
	}
	
	// drawRow draws one row of the board, which consists of 3 blocks
	public void drawRow() {
		drawBlock();
		scoot();
		drawBlock();
		scoot();	
		drawBlock();
	}
	
	// scoot moves the buggle to the starting position to draw a block
	public void scoot() {
		this.brushUp();
		this.forward(5);
		this.brushDown();
	}
	
	// moveToNewRow moves the buggle from the end of one row to the start of the next one
	public void moveToNewRow() {
		this.brushUp();
		this.left();
		this.forward(5);
		this.left();
		this.forward(10);
		this.right();
		this.right();
		this.brushDown();
	}
	
	// drawBlock draws one block of the board
	public void drawBlock() {
		this.setColor(Color.red);
		this.drawPattern();
		this.setColor(Color.blue);
		this.drawPattern();
		this.setColor(Color.yellow);
		this.drawPattern();
		this.setColor(Color.black);
		this.drawPattern();
	}
	
	// drawPattern draws one step pattern
	public void drawPattern () {
		this.brushUp();
		this.forward();
		this.brushDown();
		this.forward();
		this.brushUp();
		this.left();
		this.forward();
		this.brushDown();
		this.backward();
		this.right();
		this.brushUp();
		this.forward();
		this.brushDown();
		this.forward();
		this.left();
	}
	
}