How do you make a OnTouched Badge script?

If you create a badge and upload it to a place, ROBLOX will automatically put a badge giver model in your models. Just use that.

Use BadgeService and see the what you can do with the service,

Local BS=Game:GetService("BadgeService") 
local PS=Game:GetService("Players")
local bin=script.Parent
local BadgeID=512893 --Works as long as you're the owner of a certain badge with certain ID

bin.Touched:connect(function(Hit)
if Hit.Parent:FindFirstChild("Humanoid").Health~=0 then
local player=PS:GetPlayerFromCharacter(Hit.Parent) if player then
if player.userId<=100==nil then --[[Makes sure guests can't use it, without this line, guests would glitch the script, I think.]]
BS:AwardBadge(player.userId,BadgeID) end end end)

Well, when the badge is made, go into Roblox Studio. Make sure you have the Tool Box open, if you dont have it open, go to View -> Tool Box. Click My Models which is one of the options on the tool box. Your badge should be in there. The script is already in side the badge awarder!