script wanted: clock for text mode screen

[Skaperen]

i would like to see someone write a script to draw a big digital clock on the full text mode screen, updated as fast as it can, but not faster than every second.  it should fit the screen, whatever size it is (i have code to get the screen size in linux).  it should display 6 digits or either 4 or 6 digits if there some option to display the other number of digits (i want to display 6 digits one way or another).  showing the date (in ISO format, YYYY-MM-DD) in normal characters in the lower left corner is a plus.