JavaCard OS

Hi. I am new in java card. I downloaded and run the ECC sample code in JCIDE from your algorithm school source. How do I know how the code works? What is the command should I use for? Thanks in advance.
I am sorry if this is the stupidest question ever asked on earth

You can download ECC-TestScript.zip from the bottom of this page. This is a test script specially for ECC.
After the project is compiled successfully in JCIDE, enter "/script scrFileFullPath" in the command inputbox of Debugshell to execute this script file.