pac-man animation

Hi All,

I am trying to design a pac-man styled watch face with some animation.

I am not very good in graphics related mathematics and need community help to achieve

1- Arc/Pi drawing : As there is no function to draw (only drawCircle and drawEllipse is available)
2 - image rotation

Here is the work in progress link:
https://www.espruino.com/ide/emulator.ht­ml?codeurl=https://github.com/abhigkar/b­anglejs-pacman-clock/blob/master/pacman.­js&upload

What I want to do is to

• draw the pac-man
  
• move pac-man in the outermost circle so that pac-pam can eat the white dots.
  
• animate pac-man for open-close his mouth
  
  

I trying to create pac-man using image but it is not efficient when rotating it on to the path.

Any suggestion or heads-up is appreciated.

Many thanks!!