What kind of error is this?

First off I'd like to thank you all for all the help you guys give. I just learned about basic coding from a book I got and it is really starting to come to me that I love scripting.

Now onto my problem.

ding = game.Lighting.CheckIn.TextButton
ping = game.Workspace.Con

script.Parent.MouseButton1Click:connect(function (onClicked)
    if MouseButton1Click then
        print ('Is this working..?')
        ding = Color3.new = ("Lime green")
        ping.CanCollide = true
        wait (1)
        ping.Veolocity = Vector3.new(0,0,-1)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-2)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-3)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-4)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-5)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-4)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-3)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-3)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-2)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,-1)
        wait(0.8)
        ping.Velocity = Vector3.new(0,0,0)
        ping.CanCollide = false
        wait(3)
        ding = TextButtonColor.new("Really red")
    end

Basically, this line:

    ding = Color3.new = ("Lime green")

is getting an error:

16:40:34.833 - Workspace.Script:5: 'then' expected near '='

I've searched Wiki but nothing. Any help?