// Assigment - Loop Olympics - Gold Medal
// 1 - Create an array that mimics a grid like the following using nested for loops:
// [[0, 0, 0], 
// [0, 0, 0], 
// [0, 0, 0]]

// 2 - Create an array that mimics a grid like the following using nested for loops:
// [[0, 0, 0], 
// [1, 1, 1], 
// [2, 2, 2]]

//3 - Create an array that mimics a grid like the following using nested for loops:
// [[0, 1, 2], 
// [0, 1, 2], 
// [0, 1, 2]]

// 4 - Given a grid like the previous ones, write a nested for loop that would change every number to an x.
// [["x", ...], 
// ["x", ...], 
// ["x",...], ...]