Loop Assignment 2

For my last assignment, I had to create a program that will produce a checkerboard pattern using loops. I had to do research on how to create loops that alternate colors in order to do this assignment and I found out about modulo(%) and I modulo in order to create my checkerboard. Modulo basically calculates what the remainder of a number is when two numbers are divided. In order to create this checkerboard I used i & j as two of my int's and made it so that when i+j divided by thirty was more than 0 one part of the screen would be black and the other part of the screen would be red. I used the number thirty because i and j were constantly being increased by 75 and 30 was the only number I  could find that when i and j were divided were divided by it caused a pattern. For example, 75/30 has a remainder, 150/30 does not, 225/30 had a remainder, but 300/30 does not and so on. This is what made me able to create a certain pattern. My finished code is down below.

int  square  = 75;

void setup() {

 size(600, 600);

}

void draw() {

  

 // i starts at 0, i increases by 75, i will stop when it's less than or equal to (width)

 // j starts at 0, j increases by 75, j will stop when it's less than or equal to (height)

 // 600/75= 8 , this board will be 8 across and 8  down(8x8)

 for ( int i = 0; i <= width; i += square) {

   for ( int j = 0; j <= height; j += square) {

     //When i+j divided by 30 has a remainder of 0 make the block black

     //When i + j divided by 30 has a remainder higher than 0 make the block red

     if ( (i+j) % 30 == 0) { //== (means equality)

       fill(#080707);//Black

     } else {

       fill(#FF0000);//Red

     }

     rect (i, j, square, square);

     //(x,y,width,height)

     

  

   }

 }

}

“A program is never less than 90% complete, and never more than 95% complete.”

– Terry Baker