<SYSTEM_TASK:>
Given the following text description, write Python code to implement the functionality described below step by step
<END_TASK>
<USER_TASK:>
Description:
 <hr>
Patrick BROCKMANN - LSCE (Climate and Environment Sciences Laboratory)<br>
<img align="left" width="40%" src="http
Step1:  Explore usage of %ferret_run line magic
Step2:  Another example
<ASSISTANT_TASK:>
Python Code:
%load_ext ferretmagic
Explanation: <hr>
Patrick BROCKMANN - LSCE (Climate and Environment Sciences Laboratory)<br>
<img align="left" width="40%" src="http://www.lsce.ipsl.fr/Css/img/banniere_LSCE_75.png" ><br><br>
<hr>
Updated: 2019/11/13
Load the ferret extension
End of explanation
for i in [100,500,1000]:
    %ferret_run -s 300,300 'set text/font=arial ; plot/thick=2 sin(i[i=1:%(i)s]*0.1)' % locals()
Explanation: Explore usage of %ferret_run line magic
End of explanation
%%ferret
use levitus_climatology
for i in range(1,3):
    %ferret_run -q -s 400,300 'set text/font=arial ; fill salt[k=%(i)s] ; go land' % locals()
Explanation: Another example
End of explanation
<END_TASK>