const int ledpin1 = 26;
const int ledpin2 = 27;
void setup() {
// put your setup code here, to run once:
pinMode(ledpin1, OUTPUT);
pinMode(ledpin2, OUTPUT);
}
void loop() {
// put your main code here,to run repeatedly:
digitalWrite(ledpin1, HIGH);
digitalWrite(ledpin2, LOW);
delay(2000);
digitalWrite(ledpin1, LOW);
digitalWrite(ledpin2, HIGH);
delay(2000);
}