squares_ugh.java

int cell = 35; // Individual cell size
int cols, rows; // Total number of columns and rows
float valueR = 50.0;
float valueG = 50.0;
float valueB = 50.0;

int count = 0;
int squareCount = 0;
sqProp[][] square;

void setup() {
  size(800, 600);
  reset();
  background(255);
}

void draw() {
  for (int col = 0; col < cols; col++) {
    for (int row = 0; row < rows; row++) {
      square[col][row].show();
    }
  }
}

void reset() {
  cols = width/cell;
  rows = height/cell;

  square = new sqProp[cols][rows];
  
  for (int col = 0; col < cols; col++) {
    int x = col*cell;
    for (int row = 0; row < rows; row++) {
      int y = row*cell; 
      println(x + " " + y);
      square[col][row] = new sqProp(x, y);
    }
  }
}

void mouseMoved() {
  int col = ((int) Math.floor(mouseX / cell));
  int row = ((int) Math.floor(mouseY / cell));
  square[col][row].updateColor(30, 40, 50);
}

class sqProp {
  float sqRed = 50, sqGreen = 50, sqBlue = 50;
  int sqX, sqY;
  
  sqProp(int squX, int squY) {
    sqX = squX;
    sqY = squY;
  }
  
  void updateColor(float r2, float g2, float b2) {
    sqRed += r2;
    sqGreen += g2;
    sqBlue += b2;
  }
  
  void show() {
    strokeWeight(.5);
    stroke(255);
    fill(sqRed, sqGreen, sqBlue, 15);
    rectMode(CENTER);
    rect(sqX + (cell / 2), sqY + (cell / 2), cell, cell);
  }
  
  
}