How do you rotate your Left Leg?

Player = game.Players.LocalPlayer
Character = Player.Character
Mouse = Player:GetMouse()
run = game:GetService("RunService")
function Kick()
	print("LOL")
	for i = 1, 10 do
		Leg = Character["Right Leg"]
		Leg.c0 = Leg.c0 *CFrame.Angles(0, 0, 0.15)
		run.Stepped:wait()
	end
end
Mouse.Button1Down:connect(Kick)

Yeah, so basically tried to make it so once Button1 is pressed your left leg will kick.

However, I get an error...

16:14:38.321 - C0 is not a valid member of Part
16:14:38.321 - Script 'Players.Player.Backpack.Karate', Line 9
16:14:38.321 - Stack End

Any soloutions!?

The issue is that you are attempting to set the C0 of the character's leg. What you want to do is set the C0 property of the character's left hip:

Player = game.Players.LocalPlayer
Character = Player.Character
Mouse = Player:GetMouse()
run = game:GetService("RunService")
function Kick()
    print("LOL")
    for i = 1, 10 do
        Hip = Character.Torso["Left Hip"]
        Hip.C0 = Hip.C0 *CFrame.Angles(0, 0, 0.15)
        run.Stepped:wait()
    end
end
Mouse.Button1Down:connect(Kick)

I'm assuming the rest of the script is incomplete, however.

You could always just make an animation in Studio and run it with the script instead.