Answer:
var playerTurn;
var NUM_COLS;
var NUM_ROWS;
var SYMBOLS;
var tiles = [];
var checkWin = function() 
{ };
var Tile = function(x, y)
 { 
 this.x = x;
 this.y = y;
 this.size = width/NUM_COLS;
 this.label = "";
 };
Tile.prototype.draw = function() 
{
 fill(214, 247, 202);
 strokeWeight(2);
 rect(this.x, this.y, this.size, this.size, 10);
 textSize(100);
 textAlign(CENTER, CENTER);
 fill(0, 0, 0);
 text(this.label, this.x+this.size/2, this.y+this.size/2);
};
Tile.prototype.empty = function() 
{
 return this.label === "";
};
Tile.prototype.onClick = function()
 {
 // If the tile is not empty, exit the function
 // Put the player's symbol on the tile
 // Change the turn
};
Tile.prototype.handleMouseClick = function(x, y) 
{
 // Check for mouse clicks inside the tile
};
for (var i = 0; i < NUM_COLS; i++) 
{
 for (var j = 0; j < NUM_ROWS; j++) 
 {
 tiles.push(new Tile(i * (width/NUM_COLS-1), j * (height/NUM_ROWS-1)));
 }
}
var drawTiles = function() 
{
 for (var i in tiles) 
 {
 tiles[i].draw();
 }
};
mouseReleased = function() 
 {
 for (var i in tiles) 
 {
 tiles[i].handleMouseClick(mouseX, mouseY);
 }
 };
draw = function()
 {
 background(143, 143, 143);
 drawTiles();
};
Step-by-step explanation: