Fe kill script

local ScreenGui = Instance.new("ScreenGui")
local ui = Instance.new("Frame")
local title = Instance.new("TextLabel")
local Frame = Instance.new("Frame")
local Username = Instance.new("TextBox")
local Kill = Instance.new("TextButton")
local cred = Instance.new("TextLabel")
--Properties:
ScreenGui.Parent = game:GetService("CoreGui")
ScreenGui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling

ui.Name = "ui"
ui.Parent = ScreenGui
ui.Active = true
ui.BackgroundColor3 = Color3.new(1, 1, 1)
ui.BackgroundTransparency = 0.20000000298023
ui.BorderSizePixel = 3
ui.Position = UDim2.new(0.254972845, 0, 0.419703096, 0)
ui.Size = UDim2.new(0, 535, 0, 283)

title.Name = "title"
title.Parent = ui
title.BackgroundColor3 = Color3.new(1, 1, 1)
title.BackgroundTransparency = 1
title.BorderSizePixel = 2
title.Position = UDim2.new(0, 0, 0.0199999996, 0)
title.Size = UDim2.new(1, 0, 0, 50)
title.Font = Enum.Font.SourceSans
title.Text = "FE KILL"
title.TextColor3 = Color3.new(0, 0, 0)
title.TextScaled = true
title.TextSize = 14
title.TextWrapped = true

Frame.Parent = title
Frame.BackgroundColor3 = Color3.new(0, 0, 0)
Frame.BorderSizePixel = 0
Frame.Position = UDim2.new(0.25, 0, 0.860000014, 0)
Frame.Size = UDim2.new(0.5, 0, 0, 3)