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based on an earlier version of the Wolfram Language.
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Clock

Clock[]
represents a clock variable whose value cycles continuously from 0 to 1 once per second when it appears inside a dynamically updated object such as a Dynamic.
Clock[t]
cycles from 0 to t every t seconds.
Clock[vmax, t]
cycles from 0 to vmax every t seconds.
Clock[{vmin, vmax}, t]
cycles through the range vmin to vmax every t seconds.
Clock[{vmin, vmax}]
cycles through the range vmin to vmax over the course of vmax-vmin seconds.
Clock[{vmin, vmax, dv}]
cycles from vmin to vmax in steps of dv, spending dv seconds at each value.
Clock[{vmin, vmax, dv}, t]
cycles from vmin to vmax in steps dv every t seconds.
Clock[vals, t, n]
goes through the cycle only n times, then always yields only the maximum value.
  • The base for all times used by Clock is the creation time of the cell in which Clock appears.
  • Clock[Infinity] gives a value that ranges from 0 to ∞ at a rate of one unit per second.
  • Clock[{vmin, Infinity}] gives a value that ranges from vmin to ∞, at a rate of one unit per second.
  • Clock[{vmin, Infinity, dv}] ranges from vmin to ∞ in steps of dv, spending dv seconds at each value.
Create a clock value that cycles continuously from 0 to 1 once per second:
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Use Clock to trigger updates for some time interval:
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New in 6