def setup():
    size(400,400)
    background(0)
    frameRate(10)
#variables pour la balle A
xA=200
dxA=5
yA=200
dyA=10

#variables pour la balle B
xB=100
dxB=-5
yB=100
dyB=-12

def distance(xA,xB,yA,yB):
    d=sqrt((xB-xA)**2+(yB-yA)**2)
    return d

def draw():
    print(distance(xA,xB,yA,yB))

    #detection de la collision
    if distance(xA,xB,yA,yB)<50:
        print("COLLISION DETECTEE !!!!!!!!!!!!!")
        #mettre ici les instructions pour le rebond des 2 balles

    global xA,dxA,yA,dyA
    global xB,dxB,yB,dyB
    background(0)

    #dessin de la balle A (bleue)
    fill(0,0,255)
    ellipse(xA,yA,50,50)
    xA=xA+dxA
    yA=yA+dyA
    if xA>375 or xA<25:
        dxA=-dxA
    if yA>375 or yA<25:
        dyA=-dyA

    #dessin de la balle B (rouge)
    fill(255,0,0)
    ellipse(xB,yB,50,50)
    xB=xB+dxB
    yB=yB+dyB
    if xB>375 or xB<25:
        dxB=-dxB
    if yB>375 or yB<25:
        dyB=-dyB