public boolean checkComplete() {
		
		int count = 0;
		
		//Check if all answers entered
		for(int i=0;i<3;i++) {
			for(int n=0;n<3;n++) {
				for(int t=0;t<3;t++) {
					for(int e=0;e<3;e++) {
						
						if(grid[i][n][t][e].getText().equals("")) {
							grid[i][n][t][e].setBackground(Color.RED);
							count++;
						}
						
					}
				}
			}
		}
		
		repaint();
		
		if(count > 0) {return false;}
		else {return true;}
		
	}