Create my own programming language

An example for some simple computations could look like:

Expr = Mult , { ( "+" | "-" ),  Mult }
Mult = Num , { ( "*" | "/" ),  Num }
Num = ("(" , Expr, ")" ) | ( DigitNZ , {Digit} )
Digit = DigitNZ | "0"
DigitNZ = "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

Using the above EBNF the expression "(0 - 12) * 5 + 1" would result in the following tree:

Expr ? + ?
+-Mult ? * ?
|  +- Num ( ? )
|  |  +- Expr ? - ?
|  |     +- "0"
|  |     +- "12"
|  +- "5"
+- "1"

"
'
?
+
-
Hello
""

Comments look like:
//
Example:

\\This is an example code of a comment.

Math signs look like:

+, -, \ (divide), *(multiply), ~ (Round-up answer)
They will appear blue text
Example:

5 + 4  \ 3

On the code the answer will be 3.

IF you round your answer:

5.4 +4.91 ~ (1)

Your answer will be 10.31 but the rounding to 1 decimal will make it 10.3.

~ = round-up
(1) = round decimals

If you wanted to define text:

Integer as [test_text]

then you can input without errors:

test_text = 

Adding a word like "Interger" and the string [Your_string] will define your word.

Showing message boxes:

ShowMsgbox("Your text here", ButtonsOKCancel, Exclamation, "Msgbox test" -noclosebutton)

Parameters (special):
The - define the parameter such as for msgboxes:

-noclosebutton
-opaquebox #
-showhelpbutton
-addbutton, "Testtext", [TEST01]
TEST01 = Code

Starting a code:
Start {
Ending a code:
End }

If's, thens, ends, else

If <ADDTEXT> Then
<ADDTEXT>
Else
<ADDTEXT>
End If

the <ADDTEXT> areas are where you add your txt.

If you want a word to be nothing you just input:
Void

The use of OR:

<ADDTEXT> or <ADDTEXT>

Running applications, including files:

Run "\MYAPP.exe" or Run "$GAMEDIR\MyApp.exe"

Include Test.bzc

The BZC files are the script file extension.
You can also include files in the same folder as the code:

Include Test01.bzc

Or

Include Folder01\Test02.bzc

The "print" function:

Print "123"

Color function:

ColorRed, ColorBlue or

Color0, 0, 0, 0 (ColorRed, Green, Blue, Alpha)

Loops:
Loops=repeats
Example:

ShowMsgbox("Test") Loop [U]
U = If file("Test.txt") *exists

(don't know much about loops)

Files existing

If "Text1.txt" exists Then
	<ADDTEXT>
Else
	ShowMsgbox("Test")
End If

Eliminating/Adding objects:

Eliminate object.test
Add object.test at position(X,Y,Z)

Object properties:

Example: pressbutton

Pressbutton01.Text ("Pressbutton")

Output a file:

outputfile > ("\$APPDIR\", "Test", *.txt)

Output folder, name and extension. Many more codes.

Showing a message when picked up item (medikit)
Item.medikit.pickup {
Print("You picked up a medikit")
AddPlayerHealth "25"
PickupSound("\Sounds\Items\MediPickup25.wav")

That is just an simple medi-kit pickup.
}

Some Variables:

AddPlayerHealth #
AddPlayerArmor #
AddPlayerAmmo #

# = Enter a value

Expr = Mult , { ( "+" | "-" ),  Mult }
Mult = Num , { ( "*" | "/" ),  Num }
Num = ("(" , Expr, ")" ) | ( DigitNZ , {Digit} )
Digit = DigitNZ | "0"
DigitNZ = "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"

When you have that you need to write a scanner/tokenizer that takes a source code and converts a the stream of characters into a stream of syntax objects: