How do I make a ":gear" command?

So, basically I was making my own Admin Commands, and I don't know how to make the ":gear" command.

Admin command script:

   local admins = {"mateja1119"}



game.Players.PlayerAdded:Connect(function(plr) 
for i,v in ipairs(admins) do    
if plr.Name == admins then    
plr.Chatted:connect(function(msg)

if msg:sub(1,6) == ":speed " then    
local targetplr = game.Players:FindFirstChild(msg:sub(7))   
if targetplr then   
local targetplrchar = targetplr.Character   
if targetplrchar then    
local speed = msg:sub(8)    
if speed then    
targetplrchar.Humanoid.WalkSpeed = speed    
end
end    
end    
end  

if msg:sub(1,6) == ":kill " then   
local targetplr0 = game.Players:FindFirstChild(msg:sub(7))
if targetplr0 then
targetplr0.Character:BreakJoints()
end    
end

if msg:sub(1,5) == ":god " then    
local targetplr1 = game.Players:FindFirstChild(msg:sub(6))    
if targetplr1 then    
targetplr1.Character.Humanoid.Health = math.huge()    
end    
end

if msg:sub(1,6) == ":kick " then    
local targetplr2 = game.Players:FindFirstChild(msg:sub(7))    
if targetplr2 then   
targetplr2:Kick("Kicked!")    
end   
end

if msg:sub(1,6) == ":gear " then    
print("oof idk how to make")    
end   
end)    
end    
end    
end)

oof.