#include <reg.h>
sbit SW=P2^7
void main()
  {
    SW = 1
    while(1)
      {
        if(SW == 0)
          {
        P1 = 0x66
        MSDelay(100)
        P1 = 0xCC
        MSDelay(100)
        P1 = 0x99
        MSDelay(100)
        P1 = 0x33
        MSDelay(100)
          }
        else
          {
        P1 = 0x66
        MSDelay(100)
        P1 = 0x33
        MSDelay(100)
        P1 = 0x99
        MSDelay(100)
        P1 = 0xCC
        MSDelay(100)
          }
      }
  }
void MSDelay(unsigned int value)
  {
    unsigned int x, y
    for(x=0
      for(y=0
  }