\visible[from number1 to number2]

\parstepwise{%
  \step[][\value{step}=1\or\value{step}=2]{a -- on 1 and 2}\\
  \step[][\value{step}=2\or\value{step}=3]{b -- on 2 and 3}\\
  \step[][\value{step}=3\or\value{step}=4]{c -- on 3 and 4}%
}

The previous code does not work as intented.
The last step is shown when step=3 but not when step=4
because totalsteps=3.
Is there a way to force totalsteps to be 4 ?

More generally I would like to write a macro \visible that could be
used like this :
     \visible[3, 5]{text} % text is shown on step 3, 4 and 5 only.

Without the problem shown above, such a macro could be :
\def\visible[#1,#2]{\step[\value{step}=#1][\not\value{step}<#1\and\not\value{step}>#2]}

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