Groovy Script to read data from excel datasocure

Hi,
I am new to groovy. I want to write a groovy script to read data from excel(test.csv) and transfer the property to next test step.This excel sheet contains data in muliple row and column. I like to read all data from first column and once i get to the end of the file, read data from next column until all data is read. Here is my test steps:
1) Read data from excel file
2) Transfer the property to next test step
3) ....(test step to test data)...
4) Datasource loop to step 2

Can you please show me what should be the groovy script?
Any help is appreciated.
Thanks