expected unqualified-id before numeric constant error

hey guys i get a error(expected unqualified-id before numeric constant) on my int's for some reason no idea why

this is my code

int sensor = 1;
int l3rood = 8;
int l3oranje = 7;
int l3groen = 6;
int 24rood = 5;
int 24oranje = 4;
int 24groen = 2;

int buttonState = 0;

void setup() {
pinMode(l3rood, OUTPUT);
pinMode(l3oranje, OUTPUT);
pinMode(l3groen, OUTPUT);
pinMode(24rood, OUTPUT);
pinMode(24oranje, OUTPUT);
pinMode(24groen, OUTPUT);
pinMode(druksensor, INPUT);
}

void loop() {
int buttonState = digitalRead(sensor);

if (buttonState == HIGH){
digitalWrite (24rood, HIGH);
digitalWrite (13groen , LOW);
digitalWrite (13oranje , HIGH);

delay (3000);

digitalWrite (13rood , HIGH);
digitalWrite (13oranje , LOW);
digitalWrite (24rood , LOW);
digitalWrite (24groen , HIGH);

delay (10000);

digitalWrite (13groen , LOW);
digitalWrite (24oranje , HIGH);
digitalWrite (24rood , HIGH);

delay (3000);

digitalWrite (24oranje , LOW);
digitalWrite (13rood , LOW);

}

else {
digitalWrite (24rood , HIGH);
digitalWrite (24oranje , LOW);
digitalWrite (24groen , LOW);
digitalWrite (13groen , HIGH);
digitalWrite (13oranje , LOW);
digitalWrite (13rood , LOW);
}

don't try to use a digit as the first character for a variable name

i fixed it alrdy, thnx