startshape SINO[s 2]
CF::MinimumSize = 0.3
CF::BorderDynamic = 0
M=40
path SINO {
    MOVETO(0,0)
    loop j=1, 360*M [ ] {
        LINETO(j, 100*((sin(j*4))+sin(1.1*j*4)))
    }
    STROKE(10) [b -1 ] 
}