Creating warp signs

Creating warp signs (Optional)
Change coordinates to corresponding locations, put codes in command blocks and activate:
Blue Shop:
/give @p sign 1 0 {BlockEntityTag:{Text2:"[{\"text\":\"Go to\"}]",Text3:"[{\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/tp @p[r=4,team=teamblue] ? 67 ?\"},\"text\":\"Blue Shop\"}]"},display:{Name:"Blue Shop"}}
Blue Spawn:
/give @p sign 1 0 {BlockEntityTag:{Text2:"[{\"text\":\"Return to\"}]",Text3:"[{\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/tp @p ? 67 ?\"},\"text\":\"Blue Spawn\"}]"},display:{Name:"Blue Spawn"}}
Red Shop:
/give @p sign 1 0 {BlockEntityTag:{Text2:"[{\"text\":\"Go to\"}]",Text3:"[{\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/tp @p[r=4,team=teamred] ? 67 ?\"},\"text\":\"Red Shop\"}]"},display:{Name:"Red Shop"}}
Red Spawn:
/give @p sign 1 0 {BlockEntityTag:{Text2:"[{\"text\":\"Return to\"}]",Text3:"[{\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/tp @p ? 67 ?\"},\"text\":\"Red Spawn\"}]"},display:{Name:"Red Spawn"}}
Place Spawn signs inside shops.