Functions & Hooks
createClock
function createClock(): Clock;useClock with no React: seconds since creation as a SharedValue,
written on the UI thread, for driving a shader uniform on any target - a
canvas or an offscreen surface. Call stop() when done; the loop otherwise
runs for the process's life.
Needs react-native-reanimated, exactly as the hook does: without a UI runtime there is nothing to write the value.