Using putty with bash shell. I need help creating a script.

Usage: trash -l | -p | { filename }*

trash is a replacement for the rm utility. Rather than removing files, trash moves files into a subdirectory called .trash in your home directory. When there is a valid file to move, if .trash doesn't exist, the .trash directory is created. If .trash exists, the -l option lists the current contents. If .trash exists, the -p option removes the directory and all files in it. Your script should handle any number of files.

Where can I start?