diff --git a/assemble.bat b/assemble.bat
new file mode 100644
index 0000000..5530cfb
--- /dev/null
+++ b/assemble.bat
@@ -0,0 +1,60 @@
+@echo off
+
+:: https://stackoverflow.com/questions/32895172/how-to-detect-change-in-txt-file-using-batch
+:: https://stackoverflow.com/questions/6359820/how-to-set-commands-output-as-a-variable-in-a-batch-file
+
+setlocal enableDelayedExpansion
+
+set compmsg=assembling...
+
+del reload-trigger
+
+:do_compile
+set "stime=%time: =0%"
+set "stime=%stime:~0,-3%"
+set "stime=%stime::=%"
+set "sdate=%date:~6,4%%date:~3,2%%date:~0,2%"
+
+cls
+echo %compmsg%
+echo.
+:: taskkill /F /IM main.exe
+:: taskkill /F /IM Microsoft.Photos.exe
+:: taskkill /F /IM Video.UI.exe
+echo.
+echo assembling
+echo.
+echo %time%
+
+ruby assembler.rb
+
+echo %time%
+if %ERRORLEVEL% GEQ 1 goto compiler_error
+:: del *.obj
+:: del *.exp
+:: del *.lib
+echo.
+echo.
+echo.
+
+:compiler_error
+
+:do_compare_times
+for %%f in (*.rb *.h) do (
+	set compmsg=%%f assembling...
+
+	for /f "tokens=*" %%g in ('forfiles /m %%f /c "cmd /c echo @ftime"') do (set ftime=%%g)
+
+	set "ftime=!ftime::=!"
+
+	for /f "tokens=*" %%g in ('forfiles /m %%f /c "cmd /c echo @fdate"') do (set fdate=%%g)
+
+	set "fdate=!fdate:~6,4!!fdate:~3,2!!fdate:~0,2!"
+
+	if /i !ftime! gtr !stime! if /i !fdate! geq !sdate! (goto do_compile)
+)
+
+REM timeout /t 1 > nul
+
+goto do_compare_times
+