There seems to be a colony of bees trying to make a home near the threshold of my door. i plugged the entrance with a stick. i know i shouldn't have done that, since that will make them angry. is there a way of making them leave without hurting any bees?

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2