Method and apparatus for a programming language having fully undoable, timed reactive instructions

A machine-readable medium having stored thereon a plurality of executable instructions to perform a method comprising:

• providing a multi-modal user interface;
• enabling the multi-modal user interface to control the order of execution of a program having fully undoable instructions using checkpoints associated with discrete locations within the program;
• and
• enabling the multi-modal user interface to control the order of execution of the program using one of a predetermined seek time increment and a user-defined seek time increment.

A method comprising:

• starting execution of a fully undoable program;
• receiving a command to return execution of the fully undoable program to a previous execution point through a multi-modal user interface using one of a predetermined seek time increment and a user-defined seek time increment;
• pausing execution of the fully undoable program;
• saving a return global program state of the paused fully undoable program;
• retrieving a saved global program state associated with the previous execution point;
• and
• continuing execution of the program from the recovered global program state.

A machine-readable medium having stored thereon a plurality of executable instructions to perform a method comprising:

• starting execution of a fully undoable program;
• receiving a command to return execution of the fully undoable program to a previous execution point through a multi-modal user interface using one of a predetermined seek time increment and a user-defined seek time increment;
• pausing execution of the fully undoable program;
• saving a return global program state of the paused fully undoable program;
• retrieving a saved global program state associated with the previous execution point;
• and
• continuing execution of the program from the recovered global program state.

A method comprising:

• displaying a graphical user interface having a fully undoable multi-modal display area to output multi-modal information;
• outputting the multi-modal information in the multi-modal display area;
• displaying a plurality of non-temporal control structures to control the non-temporal output of the multi-modal information in the multi-modal display area;
• and
• displaying a plurality of temporal control structures to control the temporal output of the multi-modal information in the multi-modal display area, the plurality of temporal control structures to completely undo the temporal outputting of the multi-modal information.

A machine readable medium having stored thereon a plurality of executable instructions to perform a method comprising:

• displaying a graphical user interface having a fully undoable multi-modal display area to output multi-modal information;
• outputting the multi-modal information in the multi-modal display area;
• displaying a plurality of non-temporal control structures to control the non-temporal output of the multi-modal information in the multi-modal display area;
• and
• displaying a plurality of temporal control structures to control the temporal output of the multi-modal information in the multi-modal display area, the plurality of temporal control structures to completely undo the temporal outputting of the multi-modal information.