int numberOfSquares = 5;
int lengthOfSquares = 100;
int heightOfSquares = numberOfSquares;

int windowWidth = lengthOfSquares * numberOfSquares;
int windowHeight = windowWidth;

float [][] maze = new float [numberOfSquares][numberOfSquares];



void setup(){
  size(windowWidth, windowHeight);
  noStroke();
  
  //setup the snake color
  for(int i=0; i<numberOfSquares; i++){
    for(int j=0; j<numberOfSquares; j++){
      if(i==0 && j==0){
        maze[i][j] = 200;
      }
      else if(i==0 && j==1){
        maze[i][j] = 150;
      }
      else if(i==0 && j==2){
        maze[i][j] = 100;
      }
      else if(i==0 && j==3){
        maze[i][j] = 50;
      }
      else if(i==0 && j==4){
        maze[i][j] = 0;
      }
      else{
        maze[i][j] = 255;
      }
    }
  }
}

void draw(){
  //draw the snake
  int yPos = 0;
  for(int i=0; i<heightOfSquares; i++){
    int xPos = 0;
    for(int j=0; j<heightOfSquares; j++){
      fill(maze[i][j]);
      rect(xPos, yPos, lengthOfSquares, lengthOfSquares);
      xPos = xPos + 100;
    }
    yPos = yPos + 100;
  }
  
  noLoop();
}

//each click will move the snake one step clockwise in circles.
void mouseClicked(){
  
  
  float swap = 0;

  int i = 0;
      //move the snake to the right
      for(int j=heightOfSquares-1; j>i-1; j--){
        if(j<=heightOfSquares-1 && j>i){
          swap = maze[i][j];
          maze[i][j] = maze[i][j-1];
          maze[i][j-1] = swap;
        }
        
        //move the snake downwards
        else if(j==i){
          for(int k=i+1; k<heightOfSquares; k++){
            if(k!=heightOfSquares-1){
              swap = maze[k][heightOfSquares-1-j];
              maze[k][heightOfSquares-1-j] = maze[i][j];
              maze[i][j] = swap;
            }
            
            //move the snake to the left
            else{
              for(int m=k; m>=i; m--){
                if(m!=i){
                  swap = maze[k][m];
                  maze[k][m] = maze[i][j];
                  maze[i][j] = swap;
                }
                
                //move the snake up
                else{
                  for(int n=k; n>i; n--){
                    swap = maze[n][i];
                    maze[n][i] = maze[i][j];
                    maze[i][j] = swap;
                  }
                }
              }
            }
          }
        }
      }
  redraw();
}