doofy doof does thingy with wrong types duh

lib/tron.rb

@@ -47,8 +47,8 @@ def parse(message)
     end
   when "tick"
     puts "#{Time.now.strftime('%M%S%L')}: #{message}"
-    puts "tick took: #{Time.now.strftime('%M%S%L') - $lasttick}"
-    $lasttick = Time.now.strftime('%M%S%L')
+    puts "tick took: #{Time.now.strftime('%M%S%L').to_i - $lasttick}"
+    $lasttick = Time.now.strftime('%M%S%L').to_i
     decide()
   when "die"
     puts "#{Time.now.strftime('%M%S%L')}: #{message}"