int top=7;
int b=6;
int c=5;
int d=4;
int e=3;
int f=2;
int g=1;

void setup() {
  // put your setup code here, to run once:
pinMode(7,OUTPUT);
pinMode(6,OUTPUT);
pinMode(5,OUTPUT);
pinMode(4,OUTPUT);
pinMode(3,OUTPUT);
pinMode(2,OUTPUT);
pinMode(1, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

//number 3 on
digitalWrite(top, HIGH);
digitalWrite(b, HIGH);
digitalWrite(c, HIGH);
digitalWrite(d, HIGH);
digitalWrite(g, HIGH);
delay(1500);
//nuber 3 off
digitalWrite(top, LOW);
digitalWrite(b, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(g, LOW);
delay(1000);
//number 2 on
digitalWrite(top, HIGH);
digitalWrite(b, HIGH);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(g, HIGH);
delay(1500);
//number 2 off
digitalWrite(top, LOW);
digitalWrite(b, LOW);
digitalWrite(d, LOW);
digitalWrite(e, LOW);
digitalWrite(g, LOW);
delay(1000);
//number 1 on
digitalWrite(b, HIGH);
digitalWrite(c, HIGH);
delay(1500);
//number 1 off
digitalWrite(b, LOW);
digitalWrite(c, LOW);
delay(1000);
//number 0 on
digitalWrite(top, HIGH);
digitalWrite(b, HIGH);
digitalWrite(c, HIGH);
digitalWrite(d, HIGH);
digitalWrite(e, HIGH);
digitalWrite(f, HIGH);

}