Chessboard

int fillStyle=0;

int squares = 20; //How many squares to a side?

int boardSize = 600; //Set pixel size for the board itself within the window.

float dx = boardSize/squares; //Size of each square in the board

int step = 0;

int turn = 1;

int interval = 1;

boolean isRed = true; //Determines if the first checker will be red or not

​

​

//The drawCheckerboard function separates the step of drawing the checkerboard

//from the rest of the function in case it needs to occur multip.

void drawCheckerboard(){

  for(int i = 0;i<squares;i++){  //Set up a nested loop for the rows & columns

    for(int j = 0;j<squares;j++){

      fill(fillStyle);  //Set the fill color to be the color stored in fillStyle

      rect(j*dx,i*dx,dx,dx); //Draw the square

      if(fillStyle==0){  //Switch the fill color variable after drawing each square

        fillStyle=255;

      } 

      else{

        fillStyle=0;

      }

    }

    if(squares%2==0 && fillStyle==0){ //If there is an even # of squares, switch the color at the end of the row. Otherwise, you get stripes!

        fillStyle=255;

      } 

      else if(squares%2==0 && fillStyle==255){

        fillStyle=0;

      }

}

}