New coop behavior

I put my chickens ( now 6 weeks old) into their new home on Sunday. The first night they all stayed inside and stayed there all day Monday until around 6pm. They then came out and ate and pecked around the rest of the evening. I went out around 10 and they were all bundled together in the corner of the run, not even under the coop. My design is an elevated coop, about 2 feet off the ground with a ramp going up to it. They have food and water under the coop as well as water inside. Is this normal and they are just adjusting to new surroundings? I have 4 BR hens, 1 BR Roo, and 3 silkies.