SYS "Hourglass_On", SYS "Hourglass_Off" for on & off
SYS "Hourglass_Smash" => turn off now; off has to be called the same number of times as on.
SYS "Hourglass_Start",delay => on after delay centisecs (Must be >=1); _On waits 0.33 secs
SYS "Hourglass_Percentage",pc => Put %age under eggtimer
SYS "Hourglass_LEDs",eor,and => Set state of 'LEDs' (Blue bars) AND then EOR current state (1<<0 - Top, 1<<1 - Bottom)