New Year! Take your smartphone horizontally and draw a christmas tree. The garlands, the snowflakes and the salut are controlled by the acceleration sensor components x and z (© mIv 2020). N22 green z left right h x1 x2 Ax Ay Az sx sz Sx Sz n5 x5 y5 sound salut go n40 x40 y40

Ax

Ay

Az

Ay

z

Ax

right

-1 right

left

0 4 51

h

h Ax

x1

h Az

x2

Ax

sx

Az

sz

Sx sx

Sx

Sz sz

Sz

0 5 6

n5

n5

x5

n5

y5

Az 4.0 0.8 0.0

sound

Az 8.0 0.01

go

salut go

salut

salut 0.8 0.0

go

salut 0.8 0.0

salut

0 39 40

n40

n40 salut

x40

n40 salut

y40

x5 y5 x1 h x2 h Sx Sz x40 y40 left z right z