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#include <avr/io.h>
#include <util/delay.h>
int main(void) {
DDRB |= _BV(PB1);
while (1) {
PORTB |= (1<<2);
PORTB &= ~(1<<3);
_delay_ms(500);
PORTB &= ~(1<<2);
PORTB |= (1<<3);
_delay_ms(500);
}
return 0;
}
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