void Input()  // handle controls
{
if(_kbhit()) // boolean positive if key is pressed
{
switch(_getch()) // gets ascii val of key pressed
{
        case 'a':
        dir = LEFT;
        break;

        case 'd':
        dir = RIGHT;
        break;

        case 'w':
        dir = UP;
        break;

        case 's':
        dir = DOWN;
        break;

        case 'x':
        gameOver = true;
        break;
    }
}