Explain What the following code does.

#include

#define LED$1(0$x$01)$

#define LED$2(0$x$01)$

#define S$1(0$x$04)$

#define S$2(0$x$40)$

void main$($void$)$

$\{$

volatile int OUT$1[]=\{$LED$1,$ ~LED$1,$ LED$1,$ ~LED$1,$ ~LED$1,$ LED$1,$ LED$1,$ ~LED$1\}$;

volatile int OUT$2[]=\{$~LED$2,$ LED$2,$ LED$2,$ ~LED$2,$ LED$2,$ LED$2,$ ~LED$2,$ LED$1,\}$;

volatile int TIME$[]=\{40,10,50,20,50,15,30,15\}$;

PM$5$CTL$0$ &$=$ ~LOCKLPM$5$;

WDTCTL $=$ WDTPW $+$ WDTHOLD;

P$1$DIR $|=$ LED$1$;

P$1$OUT &$=$ ~ LED$1$;

P$4$DIR $|=$ LED$2$;

P$4$OUT &$=$ ~ LED$2$;

P$1$DIR &$=$ ~S$1$;

P$1$REN $|=$ S$1$;

P$1$OUT $|=$ S$1$;

P$2$DIR &$=$ ~S$2$;

P$2$REN $|=$ S$2$;

P$2$OUT $|=$ S$2$;

volatile unsigned int i;

volatile unsigned int j;

volatile unsigned int k;

for $($;;$)$

$\{$

P$1$OUT &$=$ ~LED$1$;

P$4$OUT &$=$ ~LED$2$;

if$(!($S$1$ & P$1$IN$))$

$\{$

while $($S$2$ & P$2$IN$)$

$\{$

for$($i$=0$; i$<8$; i$++)$

$\{$

if $($OUT$1[$i$]==$ LED$1)$

P$1$OUT $|=$ OUT$1[$i$]$;

else if $($OUT$1[$i$]==$ ~LED$1)$

P$1$OUT &$=$ OUT$1[$i$]$;

if $($OUT$2[$i$]==$ LED$2)$

P$4$OUT $|=$ OUT$2[$i$]$;

else if $($OUT$2[$i$]==$ ~LED$2)$

P$4$OUT &$=$ OUT$2[$i$]$;

for$($j$=0$; j