dureeDeplacement = 120;

deplaceHorizontal = 0;
deplaceVertical = 0;

dir = random(3);

switch(dir) {
	case 0 : deplacementVertical = 1; break;
	case 1 : deplacementHorizontal = 1; break;
	case 2 : deplacementVertical = -1; break;
	case 3 : deplacementHorizontal = -1; break;
}