New Year! Take your smartphone vertically and incline it a little. The garlands are controlled by the acceleration sensor components x and z (© mIv 2020). NY! green z left right h x1 x2 Ax Az sx sz Sx Sz

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Az

0 4 101

z

0 4 51

h

z

right

-1 right

left

h Ax

x1

h Az

x2

Ax

sx

Az

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Sx sx

Sx

Sz sz

Sz

x1 h x2 h left z right z Sx Sz