Stroke Animations for Each Character:

勾
心
斗
角

Word Definition

(in palace construction) center hook and corner link locked in constant strife (idiom)

Individual Character Details

勾 Gōu, gōu, gòu
心 xīn
斗 Dǒu, dǒu, dòu, dòu
角 Jué, jiǎo, jué