disable coin state as soon as GET COIN is received

coin.rb

@@ -63,6 +63,7 @@ end
 bot.message(content: 'GET COIN' ) do |event|
   # update score
   if coin_state_active
+    coin_state_active = false
     if(rand(100) == 47) 
       hyper_coin_amount = rand(100)
       coins = increment_coin(event.author.id, hyper_coin_amount)
@@ -71,9 +72,6 @@ bot.message(content: 'GET COIN' ) do |event|
       coins = increment_coin(event.author.id)
       event.respond "Nice catch, #{event.author.display_name}! You have #{plural('coin', coins)} now!"
     end
-
-    coin_state_active = false
-
   else
     event.respond "No coins for you, #{event.author.display_name}!"
   end