Update of several commands and index page

_build/pages/index.markdown

@@ -36,6 +36,15 @@ SmallBASIC is a fast and easy to learn BASIC language interpreter ideal for ever
 
 [Read more](/pages/guide.html)
 
+## SmallBASIC version 12.24 has been released for Windows, Linux and web browser
+
+::: date
+| June 20, 2022
+:::
+
+For details see: [Latest release](https://github.com/smallbasic/SmallBASIC/releases/tag/v12.24). Please report any issues to either the forum, email or github issues page.
+
+
 ## New article: "Language Support" provided by Joe7M
 
 ::: date

_build/reference/1448-date-ticks.markdown

@@ -2,6 +2,37 @@
 
 > TICKS
 
-Returns the number of milliseconds that have elapsed between successive calls.
+Returns the number of milliseconds that have elapsed since start of the operating system.
 
+```
+t = ticks()
+print t
+```
+
+```
+' ticks() can be used to let your game
+' run with a constant frame rate
+
+FramesPerSecond = 20
+
+for xx = 1 to 200
+
+  StartTime = ticks()
+
+  'Put your heavy computions here
+  cls
+  rect 10 + xx, 10, 50+xx, 50
+  showpage
+
+  'Delay the execution of the for-loop  
+  StopTime = ticks()
+
+  ElapsedTime = StopTime - StartTime
+
+  if(ElapsedTime < 1000 / FramesPerSecond)
+    delay(1000 / FramesPerSecond - ElapsedTime)
+  endif
+
+next
+```
 

_build/reference/651-language-func.markdown

@@ -5,3 +5,19 @@
 Declares a function. Return a value by assigning a 'variable' with the same name as the function.
 
 
+~~~
+'Main program
+print MyAddFunction(10,20)
+
+
+'Function definition
+FUNC MyAddFunction(a,b)
+
+  local c   'c is just known inside this function
+
+  c = a + b
+
+  MyAddFunction = c
+
+END
+~~~

_build/reference/669-language-mdl.markdown

@@ -2,6 +2,12 @@
 
 > MDL
 
-Modulus.
+Modulus. 
 
+The difference to MOD and % is, that MDL works also with float numbers instead of only integers.
 
+```
+Result =  2.3 MDL 1
+print Result
+'Output: "0.3"
+```

_build/reference/690-language-return.markdown

@@ -2,7 +2,9 @@
 
 > RETURN
 
-Execution branches to the command immediately following the most recent GOSUB command.
+When used with GOSUB: Execution branches to the command immediately following the most recent GOSUB command.
+
+When used with FUNC: returns the value.
 
 ```
 ...
@@ -14,3 +16,13 @@ PRINT "I am in my routine"
 RETURN
 ```
 
+```
+Result = MyAddFunction(10, 20)
+print Result
+
+
+func MyAddFunction(a, b)
+  return a + b
+end
+```
+