How to get a modified Enumerate style?

[Laser Yuan]

Hi,

I need to write an description for an algorithm in my paper, which includes
several steps . Basically the Enumerate style will fit my purpose. Except
that I want a sequence like this:

Step 1 ...
           ...
Step 2....
           ...

instead of

1. .....
    ...
2. .....
    ...

Any method could achieve this style? Thanks in advance!