I'm not sure what you're title is referring to... are you talking about a 2-5-7-1 chord progression? If so, wouldn't that be "ii-v-vii-i"?

Nope....I'm talking about a 2->5->1 progression. in this case the arabic numeral next to the V means the "5" chord is dominant. (has a flat 7)

When refering to chords, the standard is to use Roman numerals to refer to the chord.

Unlike their Arabic (1,2,3,4 etc.) counterparts, Roman Numerals can be upper and lowercase

Major chords are written using capitals. I, V, IV etc.
Minor chords are in lower-case.  ii, iii, VI,
The dominant 7 chord is written as V7.
The diminished chord is written as vii°

Using the numbers allows us to talk about chords and chord progressions independent of the key.

The chord progressions C F G7 C and F Bb C7 F can both be written as I IV V7 I.

They are functionaly the same, but they are in different keys.....

Ok, here's one:

This one has a bit more motion...

How about this?