void setup() {
 pinMode (33, OUTPUT) ;
 pinMode (32, OUTPUT) ;
 pinMode (25, OUTPUT) ;
 pinMode (26, OUTPUT) ;
}

void loop() {
 digitalWrite (26, HIGH) ;
 digitalWrite (25, LOW) ;
 digitalWrite (32, LOW) ;
 digitalWrite (33, LOW) ;
 delay (2500) ;

 digitalWrite (25, HIGH) ;
 digitalWrite (26, LOW) ;
 digitalWrite (32, LOW) ;
 digitalWrite (33, LOW) ;
 delay (2500) ;

 digitalWrite (32, HIGH) ;
 digitalWrite (25, LOW) ;
 digitalWrite (26, LOW) ;
 digitalWrite (33, LOW) ;
 delay (2500) ;

 digitalWrite (33, HIGH) ;
 digitalWrite (32, LOW) ;
 digitalWrite (25, LOW) ;
 digitalWrite (26, LOW) ;
 delay (2500) ;
}