task 11: timer

a) Create a new file naming it t11_timer.js

Create a program that does the following:

• • Draw a canvas, specifying a colour of your choice.

  • Display a count up timer, when it reaches 30 sec:

    • • stop the counter.

      • alter the background colour.

      • start a count down timer, when it reaches 0 sec:

        • • stop the counter.

          • alter the background colour.