Async

SetTimeout

Spawns an asynchronous task (a wrapper over SchelduleTask), that evaluates an expression once

SetTimeout[expr_, interval_Real] _TaskObject

A symbol has HoldFirst attribute. An interval is in milliseconds. To cancel it, use

CancelTimeout[_TaskObject]

SetInterval

Spawns an asynchronous task (a wrapper over SchelduleTask), that evaluates an expression every interval milliseconds

SetInterval[expr_, interval_Real] _TaskObject

A symbol has HoldFirst attribute. To cancel this task use

TaskRemove[_TaskObject]

or

CancelInterval[_TaskObject]