Text animation format Code Golf
Python 3, 57 bytes
lambda s:eval(s.upper().translate({70:'+[',87:']*'})[1:])

Turns a string like
f1w0f2w10

into a expression like
[1]*0+[2]*10

that it evaluated as code. This is done by turning the string uppercase, turning each f into +[ and each w into ]*, and removing the initial +. Thanks to Dennis for saving 7 bytes in Python 3 by using translate with a dictionary.