added fenced code block to README.md

README.md

@@ -2,7 +2,7 @@ Software functions for MSP430 to drive WS2812/B RGB LEDs via one-wire bus
 
 The SPI peripheral will be used in cooperation with one of two transport stream encodings schemes.
 One 3-bit and one 4-bit encoding was implemented for a SPI clock speed as low as 2.66MHz.
-
+```
 /*
  ******************
  * 3-bit encoding *
@@ -67,3 +67,4 @@ One 3-bit and one 4-bit encoding was implemented for a SPI clock speed as low as
 #define ONEZEROPATTERN (( ONEPATTERN<<4) | ZEROPATTERN) // 11101000 |_| |___
  // ___ ___
 #define ONEONEPATTERN (( ONEPATTERN<<4) | ONEPATTERN) // 11101110 |_| |_
+```