diff --git a/pico/lib/dma.py b/pico/lib/dma.py
index 04abead..85af8d9 100644
--- a/pico/lib/dma.py
+++ b/pico/lib/dma.py
@@ -93,8 +93,8 @@ class PIO_DMA_Transfer():
         self.dma_chan.CTRL_TRIG.INCR_WRITE = 0
         self.dma_chan.CTRL_TRIG.INCR_READ = 1
             
-    def start_transfer(self, buffer):
-        self.dma_chan.READ_ADDR_REG = uctypes.addressof(buffer)
+    def start_transfer(self, buffer, offset=0):
+        self.dma_chan.READ_ADDR_REG = uctypes.addressof(buffer) + offset
         self.dma_chan.CTRL_TRIG.EN = 1
 
     def transfer_count(self):
diff --git a/pico/lib/ws2812.py b/pico/lib/ws2812.py
index 5d0b865..9b59957 100644
--- a/pico/lib/ws2812.py
+++ b/pico/lib/ws2812.py
@@ -29,8 +29,10 @@ class WS2812B:
         self.invert = invert
         self.pio_dma = dma.PIO_DMA_Transfer(state_machine+4, state_machine, 8, num_leds*3)
 
-    def show(self):
-        self.pio_dma.start_transfer(self.ar)
+    def show(self, array=None, offset=0):
+        if array is None:
+            array = self.ar
+        self.pio_dma.start_transfer(array, offset)
         
     def set(self, i, color):
         self.ar[i*3] = int(color[1]*self.brightness)