diff --git a/Project Code/doorlock/doorlooc.c b/Project Code/doorlock/doorlooc.c
index bb57bd6..6ecf0fc 100644
--- a/Project Code/doorlock/doorlooc.c	
+++ b/Project Code/doorlock/doorlooc.c	
@@ -3,6 +3,7 @@
 #include <reg51.h>
 
 // connected pins
+sfr LCD_PORT = 0x90; // port 1 >> LCD_PORT
 // keypad rows
 sbit keyrow1 = P2 ^ 0;
 sbit keyrow2 = P2 ^ 1;
@@ -27,21 +28,22 @@ void lcdcmd(unsigned char);
 void lcddat(unsigned char);
 void lcddisplay(unsigned char *q);
 char keypad();
-void check();
-void delay(unsigned int);
+void check(unsigned char *Epin);
+void delay(unsigned int j);
 unsigned char pin[] = {"12345"};
-unsigned char Epin[5];
+
 
 // main function
 void main()
 {
+    unsigned char Epin[5];
     lcdcmd(0x0F); //decimal value: 15
     lcdcmd(0x38); //decimal value: 56
     lcdcmd(0x01); //decimal value: 1
 
     while (1)
     {
-        unsigned int i = 0;
+        unsigned char i = 0;
         lcdcmd(0x80); //decimal value: 128
         lcddisplay("ENTER PIN NUMBER");
         delay(1000);
@@ -52,25 +54,23 @@ void main()
             delay(1000);
             i++;
         }
-        check();
+        check(Epin);
     }
 }
 
 //delay function
 void delay(unsigned int j)
 {
-    int a, b;
+    unsigned char b;
+    int a;
     for (a = 0; a < j; a++)
-    {
-        for (b = 0; b < 10; b++)
-            ;
-    }
+        for (b = 0; b < 10; b++);
 }
 
 // lcd commands functions
 void lcdcmd(unsigned char A)
 {
-    P1 = A;
+    LCD_PORT = A;
     rs = 0;
     rw = 0;
     en = 1;
@@ -82,7 +82,7 @@ void lcdcmd(unsigned char A)
 
 void lcddat(unsigned char i)
 {
-    P1 = i;
+    LCD_PORT = i;
     rs = 1;
     rw = 0;
     en = 1;
@@ -96,9 +96,8 @@ void lcddisplay(unsigned char *q)
 {
     int k;
     for (k = 0; q[k] != '\0'; k++)
-    {
         lcddat(q[k]);
-    }
+    
     delay(10000);
 }
 
@@ -206,14 +205,14 @@ char keypad()
         if (keycolumn2 == 0)
         {
             lcddat('*');
-            delay(1000);
+            (1000);
             x = 1;
             return '0';
         }
         if (keycolumn3 == 0)
         {
             lcddat('*');
-            delay(1000);
+            (1000);
             x = 1;
             return '#';
         }
@@ -222,24 +221,24 @@ char keypad()
 
 // password check function and run the door motor
 
-void check()
+void check(unsigned char *Epin)
 {
     //  compare the input value with the assign password value
     if (pin[0] == Epin[0] && pin[1] == Epin[1] && pin[2] == Epin[2] && pin[3] == Epin[3] && pin[4] == Epin[4])
     {
-        delay(1000);
+        (1000);
         lcdcmd(0x01); //decimal value: 1
         lcdcmd(0x81); //decimal value: 129
         // show pin is correct
         lcddisplay("PIN CORRECT");
-        delay(1000);
+        (1000);
         // door motor will run
         motorpin1 = 1;
         motorpin2 = 0;
         lcdcmd(0xc1); //decimal value: 193
         // show the door is unlocked
         lcddisplay("DOOR OPENED");
-        delay(10000);
+        (10000);
         motorpin1 = 1;
         motorpin2 = 0;
         lcdcmd(0x01); //decimal value: 1
@@ -249,9 +248,9 @@ void check()
         lcdcmd(0x01); //decimal value: 1
         lcdcmd(0x80); //decimal value: 128
         lcddisplay("WRONG PIN");
-        delay(1000);
+        (1000);
         lcdcmd(0x01); //decimal value: 1
     }
 }
 
-// end
\ No newline at end of file
+// end