/give @p minecraft:oak_sign{BlockEntityTag:{
Text1:"{
    \"text\":\"注意\",
    \"clickEvent\":{\"action\":\"run_command\",\"value\":\"/clone ~ ~ ~ ~ ~ ~ ~1 ~ ~1\"}}",
Text2:"{
    \"text\":\"叩くと\",
    \"clickEvent\":{\"action\":\"run_command\",\"value\":\"/clone ~ ~ ~ ~ ~ ~ ~-1 ~ ~1\"}}",
Text3:"{
    \"text\":\"看板が\",
    \"clickEvent\":{\"action\":\"run_command\",\"value\":\"say あ～あ\"}}",
Text4:"{
    \"text\":\"増えるで\",
    \"clickEvent\":{\"action\":\"run_command\",\"value\":\"say 増えちゃったよ\"}}"}}