RAIN(6) Games Manual RAIN(6)

rain
animated raindrops display

rain [-d delay]

The output of rain is modeled after the VAX/VMS program of the same name.
Delay between updates (in milliseconds). If the terminal is faster than 9600 baud, must be set to non-zero to obtain a proper rain effect. The default is 120.

Eric P. Scott
October 14, 2020 NetBSD 10.0