Natyashastra
यथा चूर्णपदैश्चित्रैरुपर्युपरि पातितैः । पन्नगानां गतिः कार्या पादैः स्वस्तिकसंज्ञितैः ॥ १०९॥
Gait of serpents will be by the Svastika feet. ॥ To represent it the actor॥ is to move in the Pārśvakrāntā Cārī and then to make a Recaka of the Svastika feet.
english translation
yathA cUrNapadaizcitrairuparyupari pAtitaiH । pannagAnAM gatiH kAryA pAdaiH svastikasaMjJitaiH ॥ 109॥
hk transliteration by Sanscript