Character Selection Gui problem?

So I'm making a character selection gui in my place (btw its a localscript)

The gui (all 3 are text buttons) is positioned like this

[<] [Mikasa] [>]

Supposedly when you click < or > they're to change the text to either "Armin" or "Connie" but everytime I'm clicking , it doesn't do anything. Can't even see the print in the output.

Can anyone help me out?

d = 1
print("arrowthingies")
while true do
function rightc()
d = d + 1
print("itwurks")
end

function leftc()
d = d - 1
print("yeslol")
end

if d == 1 then
script.Parent.left.Visible = false
end
if d == 3 then
script.Parent.right.Visible = true
end

if d == 1 then
script.Parent.selection.Text = "Mikasa"
elseif d == 2 then
script.Parent.selection.Text = "Armin"
elseif d == 3 then
script.Parent.selection.Text = "Connie"
end 
wait()
end
script.Parent.right.MouseButton1Down:connect(rightc)
script.Parent.left.MouseButton1Down:connect(leftc)