/setblock 13 65 9 minecraft:chest 0 replace
{Items:
[{id:minecraft:banner,Count:1,Slot:0,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:ts,Color:4},{Pattern:rs,Color:4},{Pattern:hhb,Color:15},{Pattern:ms,Color:4},{Pattern:ls,Color:4},{Pattern:drs,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:1,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:ts,Color:4},{Pattern:bs,Color:4},{Pattern:ms,Color:4},{Pattern:ls,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:2,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:ls,Color:4},{Pattern:rs,Color:4},{Pattern:ts,Color:4},{Pattern:ms,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:3,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:bo,Color:15},{Pattern:ls,Color:4},{Pattern:bs,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:4,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:drs,Color:4},{Pattern:dls,Color:4},{Pattern:hhb,Color:15},{Pattern:ls,Color:4},{Pattern:rs,Color:4}]}}},
{id:minecraft:banner,Count:1,Slot:8,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:9,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:bo,Color:15},{Pattern:ls,Color:4},{Pattern:bs,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:10,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:ls,Color:4},{Pattern:rs,Color:4},{Pattern:ts,Color:4},{Pattern:ms,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:11,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:ls,Color:4},{Pattern:rs,Color:4},{Pattern:drs,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:12,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:bo,Color:15},{Pattern:cs,Color:4},{Pattern:ts,Color:4},{Pattern:bs,Color:4},{Pattern:bo,Color:15}]}}},
{id:minecraft:banner,Count:1,Slot:13,tag:{BlockEntityTag:{Base:15,Patterns:[{Pattern:ls,Color:4},{Pattern:rs,Color:4},{Pattern:ts,Color:4},{Pattern:ms,Color:4},{Pattern:bo,Color:15}]}}},}]}