Please help me in desperate right now I really need my phone

[AC Question]

I tried to do a few things but no go i have a Samsung galaxy s4 and a big android guy is in the middle of my phone and underneath him it says downloading and do not turn off target ?????? :/ and in the top left hand corner it says Odin mode (product name: gt-19506) (current binary: custom ) (system status: custom ) (Knox kernel lock:0x0) (Knox warranty void:0x1) and qualcomm secureboot: enable Rp swerv: s1, t1, R1, a1, p1 write protection: enable udc start........ please help I have no idea and I would really appreciate help if can be given :/