Started implementing mixers

Assets/Prefabs/Buildings/StairBuilding.prefab

@@ -157,9 +157,9 @@ GameObject:
   serializedVersion: 6
   m_Component:
   - component: {fileID: 2305386115665963243}
-  - component: {fileID: 4901325652048475046}
+  - component: {fileID: 4128879575467903701}
   m_Layer: 10
-  m_Name: Colliders
+  m_Name: Collider
   m_TagString: Untagged
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
@@ -172,20 +172,20 @@ RectTransform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 5089027117596162827}
-  m_LocalRotation: {x: 0, y: 0, z: 0.38268343, w: 0.92387956}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 7134460453558218992}
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 45}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0.5, y: 0.5}
   m_AnchorMax: {x: 0.5, y: 0.5}
   m_AnchoredPosition: {x: 0, y: 0}
-  m_SizeDelta: {x: 100, y: 100}
+  m_SizeDelta: {x: 80, y: 80}
   m_Pivot: {x: 0.5, y: 0.5}
---- !u!61 &4901325652048475046
-BoxCollider2D:
+--- !u!60 &4128879575467903701
+PolygonCollider2D:
   m_ObjectHideFlags: 0
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
@@ -228,5 +228,9 @@ BoxCollider2D:
     drawMode: 0
     adaptiveTiling: 0
   m_AutoTiling: 0
-  m_Size: {x: 114, y: 5}
-  m_EdgeRadius: 0
+  m_Points:
+    m_Paths:
+    - - {x: 40, y: 40}
+      - {x: -40, y: -40}
+      - {x: 40, y: -40}
+  m_UseDelaunayMesh: 1