How to make Inverter at Home

1int out1 = 8;
2int out2 = 7;
3void setup()
4{
5pinMode(out1,OUTPUT);
6pinMode(out2,OUTPUT);
7}
8void  loop()
9{
10digitalWrite(out2,LOW);
11digitalWrite(out1,HIGH);
12delay(20);
13digitalWrite(out1,LOW);
14digitalWrite(out2,HIGH);
15delay(20);
16}
17