refactor: add generateRadialGradient
refactor: add generateRadialGradient

JLHwung/the-days,crvv/days,the-days/the-days,JLHwung/the-days,the-days/the-days,crvv/days,JLHwung/the-days,crvv/days,the-days/the-days,crvv/days,the-days/the-days