<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def led(host, seq, anim, f, d):
 """ Control the drones LED. Parameters: seq -- sequence number anim -- Integer: animation to play f -- Float: frequency in HZ of the animation d -- Integer: total duration in seconds of the animation """

    at(host, 'LED', seq, [anim, float(f), d])