#include <LPC17xx.h>

int main(){
	unsigned long x, i;
	// from P1.24 -> 31
	LPC_PINCON->PINSEL3 &= 0x0000FFFF;  // values 

	LPC_GPIO1->FIODIR = 0xFF000000; 
	
	x = 0x01000000; // new variable
	
	while(1){
	x = 0x01000000; 
		
	for(i=0;i<256;i++){
		LPC_GPIO1->FIOSET=x;
		x = x + 0x01000000;
		LPC_GPIO1->FIOCLR=-x;
	}
	}
}