int result = 0;

void setup() {
pinMode(7,OUTPUT);
pinMode(2,OUTPUT);
pinMode(4,OUTPUT);
pinMode(8,OUTPUT);
Serial.begin(115200);
randomSeed(analogRead(A0));
}

void loop() {
result = random(1,100);
delay(1000);

Serial.println(result);

if (result < 26) {
digitalWrite(8, HIGH);
}
else {
digitalWrite(8, LOW);
}

if (result < 51 && result > 25) {
digitalWrite(2, HIGH);
}
else {
digitalWrite(2, LOW);
}

if (result < 76 && result > 50) {
digitalWrite(7, HIGH);
}
else {
digitalWrite(7, LOW);
}

if (result < 101 && result > 75) {
digitalWrite(4, HIGH);
}
else {
digitalWrite(4, LOW);
}
}