3 ms·
alias snow='for ((I=0;J=--I;)); do clear; for ((D=LINES;S=++J*3%COLUMNS,--D;)); do printf %*s.\\n $S;done;sleep .1;done'
by unforswearing 2y ago
alias snow='for ((I=0;J=--I;)); do clear; for ((D=LINES;S=++J*3%COLUMNS,--D;)); do printf %*s.\\n $S;done;sleep .1;done'