Intro:
e|---12--14-12---14-12---14-12-|---12--14-12---14-12---14-12-|
B|-15---------15------15-------|-15---------15------15-------|
G|-----------------------------|-----------------------------|
D|-----------------------------|-----------------------------|
A|-----------------------------|-----------------------------|
E|-----------------------------|-----------------------------|
[ Tab from: https://www.guitartabs.cc/tabs/i/imagine_dragons/its_time_tab_ver_8.html ]
If playing on acoustic and its hard to use those higher frets
this alternative sounds just as good
e|--0---2-0---2-0----2-0-----|--0---2-0---2-0----2-0-----|
B|-3-------3------3----------|-3-------3------3----------|
G|---------------------------|---------------------------|
D|---------------------------|---------------------------|
A|---------------------------|---------------------------|
E|---------------------------|---------------------------|