OptionalmidpointThe point where the pulsar reaches it's maximum value.
OptionalspreadThe amplitude around midpoint where the pulsar begins to receive value.
The pulsar starts gaining energy at midpoint-spread, reaches the maximum value
at midpoint and then decreases until reaches zero at midpoint+spread.
OptionaltypeType of pulsar defined by ID or string.
Params defined inside the props.oscillator.params, when
props.oscillator = 'pulsar'