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
Gmaj 355433
Am   x02210
G    320033
C    x32010

 FOur (133211@1)God Reigns
 F (133211@1)Gmaj (320003@1)AmOur (x02210@1)God Reigns
           G (320003@1)         CForever (x32010@1)Your Kingdom Reigns


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