made background black

DOTS_Pong/Assets/Paddle.prefab

   m_GameObject: {fileID: 1314940309337419778}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: -5, y: 0, z: 0}
-  m_LocalScale: {x: 0.5, y: 2.5, z: 1}
+  m_LocalScale: {x: 0.3, y: 2.5, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
   m_RootOrder: 0

DOTS_Pong/Assets/Scenes/Pong.unity

   m_Enabled: 1
   serializedVersion: 2
   m_ClearFlags: 2
-  m_BackGroundColor: {r: 0.19215687, g: 0.3019608, b: 0.4745098, a: 0}
+  m_BackGroundColor: {r: 0, g: 0, b: 0, a: 0}
   m_projectionMatrixMode: 1
   m_GateFitMode: 2
   m_FOVAxisMode: 0