diff --git a/parts/backgrounds/aura.lua b/parts/backgrounds/aura.lua
index 3927c8b2..7d16d144 100644
--- a/parts/backgrounds/aura.lua
+++ b/parts/backgrounds/aura.lua
@@ -5,7 +5,7 @@ local shader=SHADER.aura
 local t
 
 function back.init()
-    t=math.random()*2600
+    t=math.random()*260
     BG.resize(SCR.w,SCR.h)
 end
 function back.resize(_,h)
@@ -13,7 +13,7 @@ function back.resize(_,h)
     shader:send('h',h*SCR.dpi)
 end
 function back.update(dt)
-    t=t+dt
+    t=(t+dt)%2600
 end
 function back.draw()
     gc.clear(.08,.08,.084)
diff --git a/parts/backgrounds/bg1.lua b/parts/backgrounds/bg1.lua
index a08ce303..070f1614 100644
--- a/parts/backgrounds/bg1.lua
+++ b/parts/backgrounds/bg1.lua
@@ -5,14 +5,14 @@ local shader=SHADER.grad1
 
 local t
 function back.init()
-    t=math.random()*2600
+    t=math.random()*260
     back.resize()
 end
 function back.resize()
     shader:send('w',SCR.W)
 end
 function back.update(dt)
-    t=t+dt
+    t=(t+dt)%2600
 end
 function back.draw()
     gc.clear(.08,.08,.084)
diff --git a/parts/backgrounds/bg2.lua b/parts/backgrounds/bg2.lua
index 7a2952a1..4a590f3e 100644
--- a/parts/backgrounds/bg2.lua
+++ b/parts/backgrounds/bg2.lua
@@ -5,14 +5,14 @@ local shader=SHADER.grad2
 
 local t
 function back.init()
-    t=math.random()*2600
+    t=math.random()*260
     BG.resize(nil,SCR.h)
 end
 function back.resize(_,h)
     shader:send('h',h*SCR.dpi)
 end
 function back.update(dt)
-    t=t+dt
+    t=(t+dt)%2600
 end
 function back.draw()
     gc.clear(.08,.08,.084)
diff --git a/parts/backgrounds/rainbow.lua b/parts/backgrounds/rainbow.lua
index b0a5d4fc..9e9ed1cd 100644
--- a/parts/backgrounds/rainbow.lua
+++ b/parts/backgrounds/rainbow.lua
@@ -5,7 +5,7 @@ local shader=SHADER.rgb1
 
 local t
 function back.init()
-    t=math.random()*2600
+    t=math.random()*260
     BG.resize(SCR.w,SCR.h)
 end
 function back.resize(_,h)
@@ -13,7 +13,7 @@ function back.resize(_,h)
     shader:send('h',h*SCR.dpi)
 end
 function back.update(dt)
-    t=t+dt
+    t=(t+dt)%2600
 end
 function back.draw()
     gc.clear(.08,.08,.084)
diff --git a/parts/backgrounds/rainbow2.lua b/parts/backgrounds/rainbow2.lua
index ef8d5645..c6c299e6 100644
--- a/parts/backgrounds/rainbow2.lua
+++ b/parts/backgrounds/rainbow2.lua
@@ -5,7 +5,7 @@ local shader=SHADER.rgb2
 
 local t
 function back.init()
-    t=math.random()*2600
+    t=math.random()*260
     BG.resize(SCR.w,SCR.h)
 end
 function back.resize(_,h)
@@ -13,7 +13,7 @@ function back.resize(_,h)
     shader:send('h',h*SCR.dpi)
 end
 function back.update(dt)
-    t=t+dt
+    t=(t+dt)%2600
 end
 function back.draw()
     gc.clear(.08,.08,.084)