I am having trouble with a QRD1114 reflection sensor code

this is my code

void setup() {
// put your setup code here, to run once:
for (int X=2; X<=6; X++) {

pinMode (X, OUTPUT);
}
}

void loop() {
// put your main code here, to run repeatedly:
for (int X=2; X<=6; X++) {
digitalWrite(X, HIGH) ;
delay(500);
digitalWrite(LOW) ;
delay(500);
}
}

and I got this error message

Arduino: 1.8.9 (Windows Store 1.8.21.0) (Windows 10), Board: “Arduino/Genuino Uno”

\SD67\District\Users\Students\1105252\HomeDrive\Arduino\sketch_dec09a\sketch_dec09a.ino: In function ‘void loop()’:

sketch_dec09a:16:21: error: too few arguments to function ‘void digitalWrite(uint8_t, uint8_t)’

digitalWrite(LOW) ;

^

In file included from sketch\sketch_dec09a.ino.cpp:1:0:

C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.21.0_x86__mdqgnx93n4wtt\hardware\arduino\avr\cores\arduino/Arduino.h:134:6: note: declared here

void digitalWrite(uint8_t, uint8_t);

^

exit status 1
too few arguments to function ‘void digitalWrite(uint8_t, uint8_t)’

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.

can anybody help?

digitalWrite(LOW) ;

Which pin?

digitalWrite(X,LOW) ;