int baseled = 2;
int numled = 5;
int delaytime = 1000;
int bpin = 11;
int spin = 12;

 void setup() {

 for(int i=0; i<numled; i++){
  pinMode(baseled+i, OUTPUT);
  digitalWrite(baseled+i, LOW); 
  }
 pinMode (bpin, INPUT);
 pinMode (spin, INPUT);
 }

 void cycle(int delaytime) {

  for(int i=0; i<numled; i++){
  digitalWrite(baseled+i, HIGH);
  delay(delaytime);
  digitalWrite(baseled+i, LOW);
  }
 }

 int changeDelay (int delaytime) {
 if (digitalRead (bpin)) {
  delaytime = changeDelay + 100;
 }
 
 if (digitalRead (spin)) {
  delaytime = changeDelay - 100;
 }

 if (delaytime > 1000000) {
  delaytime =1000000;
 }
 if (delaytime < 10) {
  delaytime =10;
 }
 
 }



 void loop() {
 cycle(delaytime);
 }