LED flaser with Attiny13

Lets build LED flaser, only three LEDs. If put red yellow green.. it's become trafic light ?? huh .
add more transistor with many LEDs.. perhaps can maka marching ants LED as Border Movingsign .. :D

here my skecth scheme oopps is that scheme? looks like layout board huh?..



here there is source code, use avrstudio4 to build and compile:

#define F_CPU 1000000UL
#include
#include
#include
#include
#include

uint8_t a,b;

//=====================================
int main(void)

{
DDRB = 0b11111; // set output semua
PORTB =0b11111; //nilai awal
a=0b11111;
while(1)

{


if (a==0) a=0b11111;
a=a / 2;
PORTB=a;

_delay_ms(100);

}
}



i ask someone to create PCB.. i hate when i must use chemical for eth that PCB. and drill makes many holes? booring..!!!

here the PCB ready to put together with spareparts

what next ? sorry to be contiuned.. still have busy hour work at office.. see you soon.

i also posted in http://www.pcbway.com/project/share/Attiny13flashing.html