Split a variable!

Hi dear friends
In my case:
I set a variable from my webhook by “set node”:
myvar = my_name_is_meysam_001

I want to split “myvar” by “_” and split it to 5 new variable like these:
var1 = my
var2 = name
var3 = is
var4 = meysam
var5 = 001
and finally use them in my next nodes.

Can anyone help me how can do this please?
Best regards;

You can split them like this:

{
  "nodes": [
    {
      "parameters": {
        "values": {
          "string": [
            {
              "name": "myvar",
              "value": "my_name_is_meysam_001"
            }
          ]
        }
      },
      "name": "Set",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        500,
        300
      ]
    },
    {
      "parameters": {
        "functionCode": "const parts = item.myvar.split('_');\nfor (let i=0;i<parts.length;i++) {\n  item[`var${i+1}`] = parts[i];\n}\n\nreturn item;"
      },
      "name": "FunctionItem",
      "type": "n8n-nodes-base.functionItem",
      "typeVersion": 1,
      "position": [
        650,
        300
      ]
    }
  ],
  "connections": {
    "Set": {
      "main": [
        [
          {
            "node": "FunctionItem",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}