diff --git a/lib/cyberarm_engine.rb b/lib/cyberarm_engine.rb
index 7971f77..07b4f5b 100644
--- a/lib/cyberarm_engine.rb
+++ b/lib/cyberarm_engine.rb
@@ -9,6 +9,8 @@ require_relative "cyberarm_engine/version"
 
 require_relative "cyberarm_engine/common"
 
+require_relative "cyberarm_engine/gosu_ext/circle"
+
 require_relative "cyberarm_engine/game_object"
 require_relative "cyberarm_engine/engine"
 
diff --git a/lib/cyberarm_engine/gosu_ext/circle.rb b/lib/cyberarm_engine/gosu_ext/circle.rb
new file mode 100644
index 0000000..fd17606
--- /dev/null
+++ b/lib/cyberarm_engine/gosu_ext/circle.rb
@@ -0,0 +1,9 @@
+module Gosu
+  # Sourced from https://gist.github.com/ippa/662583
+  def self.draw_circle(cx,cy,r, z = 9999,color = Gosu::Color::GREEN, step = 10)
+    0.step(360, step) do |a1|
+      a2 = a1 + step
+      draw_line(cx + Gosu.offset_x(a1, r), cy + Gosu.offset_y(a1, r), color, cx + Gosu.offset_x(a2, r), cy + Gosu.offset_y(a2, r), color, z)
+    end
+  end
+end
\ No newline at end of file