How can I make a script that changes the part color, when a player has a badge

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#1

basically what I wanted to do is a part that is red, change its color to green when the player joins and has an especific badge
Just like the RB Battles badges room

#2

Check if the player owns the badge you want with :UserOwnsBadgeAsync and then change the color (you may need a local script and remote event since only the player should see the color change)
Server:

local BS = game:GetService('BadgeService')
local BadgeID = --Put your badge Id here
game.Players.PlayerAdded:Connect(function(plr)
   if BS:UserOwnsBadgeAsync(plr.UserId,BadgeID) then
      game.ReplicatedStorage.ChangePartColor:FireClient(plr)  
   end
end)

Client:

local part = -- Put the part you want to change here
game.ReplicatedStorage.ChangePartColor.OnClientEvent:Connect(function()
   part.BrickColor = BrickColor.new('Forest Green')
end)