Following is a demo of the blocks.pl program, Task 1.
?- talktome
| .
Currently...
the large yellow block is on the table
the large red block is on the table
the large blue block is on the table
the large green block is on the table
the small yellow block is on the table
the small red block is on the table
the small blue block is on the table
the small green block is on the table
What would you like to do next?
|: hello
Parsing error. Try again.
What would you like to do next?
|: pickup the large yellow block.
Currently...
the large yellow block is in the hand
the large red block is on the table
the large blue block is on the table
the large green block is on the table
the small yellow block is on the table
the small red block is on the table
the small blue block is on the table
the small green block is on the table
What would you like to do next?
|: exit
false.