Can anyone help me script this item?

[nomeen]

My script is missing the autospell section. 
"When attacking, concentration Lv 3 is cast with a single chance. (If the character's skill is higher than Lv 3, the skill will be cast when it reaches Lv.)
If the character falls, the item effect will disappear."

    Script: |
      bonus_script "{ bonus bBaseAtk,30; bonus bMatk,30; bonus bMaxHPrate,-10; bonus bMaxSPrate,-10; bonus bAspdRate,5; bonus bVariableCastrate,-5; }",1800,1,1;

I've been trying to write this script for months. but i am unable to write it, i will be very grateful if anyone can help me.

my english is not good If I use the wrong term I'm really sorry.
Thanks in advance for any comments.

Edited August 23, 2022 by nomeen

[Skorm]

On 8/23/2022 at 11:09 AM, nomeen said:

My script is missing the autospell section. 
"When attacking, concentration Lv 3 is cast with a single chance. (If the character's skill is higher than Lv 3, the skill will be cast when it reaches Lv.)
If the character falls, the item effect will disappear."

    Script: |
      bonus_script "{ bonus bBaseAtk,30; bonus bMatk,30; bonus bMaxHPrate,-10; bonus bMaxSPrate,-10; bonus bAspdRate,5; bonus bVariableCastrate,-5; }",1800,1,1;

I've been trying to write this script for months. but i am unable to write it, i will be very grateful if anyone can help me.

my english is not good If I use the wrong term I'm really sorry.
Thanks in advance for any comments.

bonus4 bAutoSpell,"AC_CONCENTRATION",max(getskilllv("AC_CONCENTRATION"),3),n,0;

Where n is the percent of cast. It does not say in the description so I guess that's up to you.

[nomeen]

On 25/8/2565 at 5 นาฬิกา 22 นาที, Skorm said:

โดยที่ n คือเปอร์เซ็นต์ของการร่าย มันไม่ได้ระบุไว้ในคำอธิบายดังนั้นฉันเดาว่าขึ้นอยู่กับคุณ

Oh, thank you very much for helping me this time. I'm very happy.