I need help whit that basic script,what i need to do?

You have to stay on the correct part but it doesent do nothing..

i use 3 parts named R . O .Y

red = script.parent.R

orange = script.parent.O

yellow = script.parent.Y

while true do hint = Instance.new ('Hint')

hint.Parent = workspace

hint.text = 'go on '

wait (3)

hint.Text = 'Red'

wait(5)
orange.Transparency = 1
orange.CanCollide = false

yellow.Transparecy = 1
yellow.CanCollide = false


wait(5)
orange.Transparency = 0
orange.CanCollide = true

yellow.Transparecy = 0
yellow.CanCollide = true



hint.Text = 'Orange'
wait(5)
red.Transparency = 1
red.CanCollide = false

yellow.Transparecy = 1
yellow.CanCollide = false


wait(5)
red.Transparency = 0
red.CanCollide = true

yellow.Transparecy = 0
yellow.CanCollide = true



hint.Text = 'Yellow'
wait(5)
red.Transparency = 1
red.CanCollide = false

orange.Transparency = 1
orange.CanCollide = false


wait(5)
red.Transparency = 0
red.CanCollide = true

orange.Transparency = 0
orange.CanCollide = true
end