b1 = box(pos = vector(-10, 4, 0), size = vector(0.5,7,7), color = color.orange)
b2 = box(pos = vector(-10, -4, 0), size = vector(0.5,7,7), color = color.orange)


emitter = box(pos = vector(-25, 0, 0), size = vector(3,3,3), color = color.white)


top = box(pos = vector(5,8,0), size = vector(10,0.5,10), color = color.red)
bottom = box(pos = vector(5,-8,0), size = vector(10,0.5,10), color = color.blue)



screen = box(pos = vector(18, 0,0), size = vector(0.5,20,20), color =color.green)


ball = sphere(pos = vector(-25,0,0), size = vector(0.5,0.5,0.5), color = color.yellow)
t = attach_trail(ball)

height = 5
width = 5
h = hit = cylinder(pos = vector(18, height, width), size = vector(1.1, 1, 1), axis = vector(1,0,0), color = color.black)


frames = 30
dt = 1.0 / frames


e = 1.6e-16
m = 10e-30
d = 16
Uy = -10
Uz = 0.8
Ustart = 400


Flaeche = 10 * 10
epsilonnull = 0.0000000000088541
epsilonr = 1.0

Feldy = Uy / d
Feldz = Uz / d

ay = (Uy / d * e) / m
ay = ay * 10e-14

az = (Uz / d * e)  / m
az = az * 10e-14

aStart = (4 * e * Ustart * 8) / m
aStart = aStart * 10e-18

vx = 0.7
vy = 0
vz = 0


while True:
  rate(frames)

  if ball.pos.x <-6:

    ball.pos.x = ball.pos.x + vx * dt
    ball.pos.y = ball.pos.y + vy * dt
    ball.pos.z = ball.pos.z + vz * dt

    vx = vx + aStart * dt

  else if ball.pos.x < 0:

    ball.pos.x = ball.pos.x + vx * dt
    ball.pos.y = ball.pos.y + vy * dt
    ball.pos.z = ball.pos.z + vz * dt

  else if ball.pos.x <10:

    ball.pos.x = ball.pos.x + vx * dt
    ball.pos.y = ball.pos.y + vy * dt
    ball.pos.z = ball.pos.z + vz * dt

    vy = vy + ay * dt
    vz = vz + az * dt

    h.pos.x = 18

  else if ball.pos.x < 17.7:

    ball.pos.x = ball.pos.x + vx * dt
    ball.pos.y = ball.pos.y + vy * dt
    ball.pos.z = ball.pos.z + vz * dt

  else if ball.pos.x > 17.7:

    vx = 0
    vy = 0
    vz = 0

    h.pos = ball.pos
    h.pos.x = 17.4

    t.stop()
    t.clear()
    ball.pos = vector(-15,0,0)
    t.start()