void setup() {
pinMode(12,OUTPUT);
pinMode(10,OUTPUT);
pinMode(8,OUTPUT);
pinMode(6,OUTPUT);
pinMode(4,OUTPUT);
pinMode(2,OUTPUT);
pinMode(1,OUTPUT);
}
void loop() {
//for 0
digitalWrite(12,LOW);
digitalWrite(10,LOW);
digitalWrite(8,LOW);
digitalWrite(6,LOW);
digitalWrite(4,LOW);
digitalWrite(2,LOW);
digitalWrite(1,HIGH); 
delay(1000);
//for1
digitalWrite(12,HIGH);
digitalWrite(10,LOW);
digitalWrite(8,LOW);
digitalWrite(6,HIGH);
digitalWrite(4,HIGH);
digitalWrite(2,HIGH);
digitalWrite(1,HIGH);
delay(1000);
//for2
digitalWrite(12,LOW);
digitalWrite(10,LOW);
digitalWrite(8,HIGH);
digitalWrite(6,LOW);
digitalWrite(4,LOW);
digitalWrite(2,HIGH);
digitalWrite(1,LOW);
delay(1000);
//for3
digitalWrite(12,LOW);
digitalWrite(10,LOW);
digitalWrite(8,LOW);
digitalWrite(6,LOW);
digitalWrite(4,HIGH);
digitalWrite(2,HIGH);
digitalWrite(1,LOW);
delay(1000);
//for4
digitalWrite(12,HIGH);
digitalWrite(10,LOW);
digitalWrite(8,LOW);
digitalWrite(6,HIGH);
digitalWrite(4,HIGH);
digitalWrite(2,LOW);
digitalWrite(1,LOW);
delay(1000);
//for5
digitalWrite(12,LOW);
digitalWrite(10,HIGH);
digitalWrite(8,LOW);
digitalWrite(6,LOW);
digitalWrite(4,HIGH);
digitalWrite(2,LOW);
digitalWrite(1,LOW);
delay(1000);
//for6
digitalWrite(12,LOW);
digitalWrite(10,HIGH);
digitalWrite(8,LOW);
digitalWrite(6,LOW);
digitalWrite(4,LOW);
digitalWrite(2,LOW);
digitalWrite(1,LOW);
delay(1000);
//for7
digitalWrite(12,LOW);
digitalWrite(10,LOW);
digitalWrite(8,LOW);
digitalWrite(6,HIGH);
digitalWrite(4,HIGH);
digitalWrite(2,HIGH);
digitalWrite(1,HIGH);
delay(1000);
//for8
digitalWrite(12,LOW);
digitalWrite(10,LOW);
digitalWrite(8,LOW);
digitalWrite(6,LOW);
digitalWrite(4,LOW);
digitalWrite(2,LOW);
digitalWrite(1,LOW);
delay(1000);
//for9
digitalWrite(12,LOW);
digitalWrite(10,LOW);
digitalWrite(8,LOW);
digitalWrite(6,LOW);
digitalWrite(4,HIGH);
digitalWrite(2,LOW);
digitalWrite(1,LOW);
delay(1000);
}