diff --git a/Snippet:-Manhattan-distance.md b/Snippet:-Manhattan-distance.md
index c585fb9..91954a3 100644
--- a/Snippet:-Manhattan-distance.md
+++ b/Snippet:-Manhattan-distance.md
@@ -1,8 +1,11 @@
 This simple program calculates the [Manhattan distance](https://en.wikipedia.org/wiki/Taxicab_geometry) between the current position of the Cubot and another tile. 
 ```assembly
 ; Define constants
-LIDAR_HW equ 0x0003    ; HWID of the LiDAR
-HOLO_HW equ 0x0009     ; HWID of the Hologram projector
+HWID_LIDAR equ 0x3
+HWID_HOLO  equ 0x9
+
+HOLO_DISPLAY_HEX equ 0x1
+LIDAR_GET_POS    equ 0x1
 
 ; Data segment
 .data
@@ -25,21 +28,21 @@ HOLO_HW equ 0x0009     ; HWID of the Hologram projector
     MOV A, 0xABCD
 
 counter_is_odd:
-    ADD [counter], 1    ; Increment counter
+    ADD [counter], 1        ; Increment counter
     MOV B, A
-    MOV A, 1
-    HWI HOLO_HW         ; Display the contents of A
-    BRK                 ; Exit program
+    MOV A, HOLO_DISPLAY_HEX
+    HWI HWID_HOLO           ; Display the contents of A
+    BRK                     ; Exit program
     
 ;**************************************
 ;* getPos()
 ;* X = X pos
 ;* Y = Y pos
 getPos:
-    PUSH A              ; Save A
-    MOV A, 0x0001       ; GET_POS
-    HWI LIDAR_HW        ; Send hardware interrupt to the LiDAR
-    POP A               ; Restore A
+    PUSH A                ; Save A
+    MOV A, LIDAR_GET_POS 
+    HWI HWID_LIDAR        ; Send hardware interrupt to the LiDAR
+    POP A                 ; Restore A
     RET