Can we change color of workflow diagram

[ashay]

I am new to activiti. I am developing a web app which displays the workflow of any process instance.
Question :
The workflow diagram displays red color for flow upto which it is completed. I want to show wokflow as follows:
1.Completed Task : Green color
2.Failed Task : Red Color
3.Task yet to complete : Yello Color
      Is this possible ?
Help me out

[martin_grofcik]

Hi,
Yes, some examples:
https://github.com/gro-mar/activiti-crystalball/wiki/Getting-started
https://github.com/gro-mar/activiti-crystalball/wiki/Drawing-into-process-diagram

Regards
Martin