Object physics

local a = 0
coroutine.resume(coroutine.create(function()
while true do
game:GetService("RunService").Stepped:Wait()
a = a + 0.02
if a == 1 or a > 1 then
a = 0
end
end
end))
while true do
    game:GetService("RunService").Stepped:Wait()
for _,v in pairs(owner.Character:GetDescendants()) do
if v:IsA("Part") then
v.CanCollide = false
v.Material = Enum.Material.ForceField
v.Color = Color3.fromHSV(255,a,1)
end
end
end