AddForests Method

	// Method to add in forest tiles to the map
	void AddForests() {
		// A for loop is run, with i starting at 0, and increasing until it has reached a sixth
		// of the total tiles, calculated by multiplying the X and Y map lengths, and dividing
		// the result by 6
		for (int i = 0; i < Mathf.RoundToInt((worldSize.x * worldSize.y) / 6); i++) {
			// Random X and Y variables are generated
			int x = Mathf.RoundToInt(Random.Range(0, worldSize.x));
			int y = Mathf.RoundToInt(Random.Range(0, worldSize.y));
			// If the forest bool of the tile attached to the node with the random 
			//  X and Y position
			if(!grid[x, y].tile.forest) {
				// The forest bool on that tile is turned true
				grid[x, y].tile.forest = true;
			}
		}
	}