Updated Scripting (markdown)

Scripting.md

@@ -5,7 +5,7 @@ The extention of them are .tegrascript, and they are normal text files.
 - \<COMMAND\> executes a command
 - "ARG" is an argument to a command
 - {} is for "if statements" (will be explained later)
-- $FLAG$ is for "if statements" (will be explained later). There's $TRUE$ and $FALSE$. $ERROR$ is an alias for $TRUE$ and $NOERROR$ is an alias for $FALSE$
+- $FLAG$ is for "if statements" (will be explained later).
 
 ## Commands
 
@@ -21,11 +21,23 @@ The extention of them are .tegrascript, and they are normal text files.
 | \<EXIT\> | Exits the script instantly |
 | \<PAUSE\> | Pauses the script until a button is pressed. returns $TRUE$ if the power button is pressed, and $FALSE$ if the volume buttons are pressed |
 
+## Flags
+Flags are basically checks, written as $FLAG$. See below for how to use them
+
+| Flag | Use |
+|:----:|:---:|
+| $ERROR$, $TRUE$ | Based on the last command run, if the last command errored out, this check will be True |
+| $NOERROR$, $FALSE$ | Based on the last command run, if the last command didn't error out, this check will be True |
+| $BTN_POWER$ | Based on the last \<PAUSE\> output. If the power button was pressed, this will return True |
+| $BTN_VOL+$ | Based on the last \<PAUSE\> output. If the volume up button was pressed, this will return True |
+| $BTN_VOL-$ | Based on the last \<PAUSE\> output. If the volume down button was pressed, this will return True |
+
+
 ## Flow control
 
 There's a sort of implementation of an else-if statement. If you run a $FLAG$ it will set an internal flag for what it should do next. if True, it will jump to the next `{` (after it exits the `{}` the flag is set to false again), if False, it will ignore everything between any `{}` it comes across (unless obviously the flag is set to true again). Example:
 
-- Example1:
+- Example 1:
 ```
 <COPY> "sd:/file1" "sd:/file2"
 
@@ -36,7 +48,7 @@ $ERROR$ {
 }
 <PAUSE>
 ```
-- Example2:
+- Example 2:
 ```
 <COPY> "sd:/file1" "sd:/file2"
 
@@ -64,3 +76,23 @@ $NOERROR$
 
 <PAUSE>
 ```
+- Example 3
+```
+<PRINT> "Press a button"
+<PRINT> ""
+<PAUSE>
+
+$BTN_POWER$ {
+<PRINT> "You pressed the power button!"
+}
+
+$BTN_VOL+$ {
+<PRINT> "You pressed the vol+ button!"
+}
+
+$BTN_VOL-$ {
+<PRINT> "You pressed the vol- button!"
+}
+
+<PAUSE>
+```