Twenty One Pilots - Be Concerned Chords & Tabs

The whole song consists of this riff, accompanied by vocals singing the same notes 
during the intro, chorus, bridge, third verse and outro.
[ Tab from: https://www.guitartabs.cc/tabs/t/twenty_one_pilots/be_concerned_tab.html ]
e|----------------------------------------------------|
B|----------------------------------------------------|
G|---3~---5-7-10--7~--3-5-7~--------------------------|
D|----------------------------------------------------|
A|----------------------------------------------------|
E|----------------------------------------------------|

The whole song is in the key of Bb minor. The chord progression is Bb, F, D# (Capo 3 
makes it easy to play rhythm, as you just have to play G, D, C).