ok so Chris Tomlin plays it on keyboard but after hearing it and
playing it myself this sounds really close. especialy when you manipulate the chords on 
like you can on keys.

F    133211
G 355433
Am   x02210
G    320033
C    x32010

 F
Our God Reigns
 F  G  Am
Our God Reigns
           G           C
Forever Your Kingdom Reigns


that's the whole song. you can repeat it as many times as you want.