There are several static elements you can use as parameters:
Text
This
element allows the user to input any desired string as a literal.
Date
This element lets you select a date from a calendar
System date
This
element gives the current system date.
System time
This
element gives the current system time.
Random Number
This element generates a random number
between 0 and 1 that can be used to include randomness in
calculations. It is very useful to simulate a random or vague
behaviour.
Window width
This element generates a number that is the width of the screen in pixels.
Window height
This element generates a number that is the height of the screen in pixels.
Window scroll X
This element gives the window's horizontal scroll position.
Window scroll Y
This element gives the window's vertical scroll position.
Cursor X
This element gives the horizontal mouse position within the window.
Cursor Y
This element gives the vertical mouse position within the window.