Datagen open source Groovy Scripting - Need to pass the excel value using groovy scripting

Need to pass the excel value endpoint using groovy scripting in sopaui opensource

Step to reproduce:

Excel having 4 values 

Ex:

12345

12346

12347

12890

12340

Teststep 1-Endpoint need to pass the first excel value

Teststep 2

Teststep 3

Teststep 4

Teststep 5

once the above execution is completed need to pick the second and pass the value in endpoint in the request and execute the below step 

Teststep 2

Teststep 3

Teststep 4

Teststep 5

If someone having the groovy scripting for the above execution please share it to us it would be more useful for my execution