how can i make a part go on a players back as gear?

how wood I do that??

Hope this works! (sorry if this didn't help) First get a part out and name it handle. Second type tool in basic objects put a tool on your workspace. Third cut the part then paste the part into the tool. Fourth drag the tool in the starter pack. Fifth make the tool royal puple for this script. Here is a basic script for your tool.

wait(1)
tool = script.Parent
handle = tool.Handle

function onClicked()
if handle.BrickColor == BrickColor.new("Royal purple") then
handle.BrickColor = BrickColor.new("Bright red")
else
handle.BrickColor = BrickColor.new("Royal purple")
end
end

function onEquipped(mouse)
mouse.Button1Down:connect(onClicked)
end

tool.Equipped:connect(onEquipped)