The following example generates a simple stimulus (a verse) and prompts the user to complete this verse (from Dante's Divine Comedy, the first lines of the Purgatorio in the translation of Longfellow).
The example will look as follows on the screen:
Here is the underlying HTML.
<html> <body> <FORM METHOD=POST ACTION=dante.php3> <h4>Please complete the following verse</h4> To run o'er better waters hoists its sail<BR> The little vessel of my genius now,<BR> That leaves behind itself a sea so cruel;<BR> <INPUT TYPE=TEXT NAME=POEM SIZE=30> <INPUT TYPE=SUBMIT VALUE="Ready"> </FORM> </body> </html>