//  ATTINY 5 LED chaser

#define led1 0
#define led2 1
#define led3 2
#define led4 3
#define led5 4
#define ON 1
#define OFF 0
void setup() 
{
 pinMode(0,OUTPUT);
 pinMode(1,OUTPUT);
 pinMode(2,OUTPUT);
 pinMode(3,OUTPUT);
 pinMode(4,OUTPUT);
 digitalWrite(led1,OFF);
 digitalWrite(led2,OFF);
 digitalWrite(led3,OFF);
 digitalWrite(led4,OFF);
 digitalWrite(led5,OFF); 
}

void loop() 
 {
   int i;
   for(i=0;i<10;i++)
     {
        digitalWrite(led1,ON);
        delay(100);
        digitalWrite(led1,OFF);
        digitalWrite(led2,ON);
        delay(100);
        digitalWrite(led2,OFF);
        digitalWrite(led3,ON);
        delay(100);
        digitalWrite(led3,OFF);
        digitalWrite(led4,ON);
        delay(100);
        digitalWrite(led4,OFF); 
        digitalWrite(led5,ON);
        delay(100);
        digitalWrite(led5,OFF); 
     }
   for(i=0;i<10;i++)
     {
        digitalWrite(led1,ON);
        delay(200);
        digitalWrite(led2,ON);
        delay(200);
        digitalWrite(led3,ON);
        delay(200);
        digitalWrite(led4,ON);
        delay(200);
        digitalWrite(led5,ON);
        delay(200);
        digitalWrite(led5,OFF); 
        delay(200);
        digitalWrite(led4,OFF);
        delay(200);
        digitalWrite(led3,OFF);
        delay(200);
        digitalWrite(led2,OFF);
        delay(200);
        digitalWrite(led1,OFF);
        delay(200);
     } 
   for(i=0;i<10;i++)
     {
      digitalWrite(led1,ON);
      digitalWrite(led2,OFF);
      digitalWrite(led3,ON);
      digitalWrite(led4,OFF);
      digitalWrite(led5,ON);
      delay(250);
      digitalWrite(led1,OFF);
      digitalWrite(led2,ON);
      digitalWrite(led3,OFF);
      digitalWrite(led4,ON);
      digitalWrite(led5,OFF);
      delay(250);   
     }
 }