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ASA 5525 firewall l2 config

We have a requirement, where we need to connect ASA FW to nexus 3064 switch and both nexus and ASA fw should look l2 network. L3 interface connected outside this network. So I have to configure nexus 3064 as l2 switch and ASA fw also as l2 only. Say few vlans 50, 100 should go through firewall via switch and few vlan 200, 250 should go through switch to the server directly. For ex: switch port e1/1 will connect to ASA fw gi0/1 and fw gi0/2 connect back switch e1/2. Need assistance to configure the firewall as layer2. I am attaching the diagram. Please do let me know if need more information.