\def\pdfpict#1{\pdfximage{#1}\pdfrefximage\pdflastximage}
\nopagenumbers
\voffset-1cm  \advance\vsize by 2.5cm


\shipout\vbox to \vsize{\centerline{\pdfpict{Avocado2.png}\qquad\pdfpict{Avocado.png}}
\pdfimageresolution80
\vfill
\pdfpict{ouchi.png}
\vfill
\pdfpict{how many colours do you see.png}}


\shipout\vbox to \vsize{\pdfimageresolution150
\pdfpict{lampa poloha v chromatickom diagrame.png}
\pdfimageresolution100
\pdfpict{lampa spektrum.png}}



\shipout\vbox to \vsize{\pdfimageresolution 150
\vfill
\centerline{\pdfpict{fheart3.png}\qquad\pdfpict{fheart4.png}}
\vfill
\centerline{\pdfpict{fheart5.png}\qquad\pdfpict{fheart6.png}}
\vfill}


\shipout\vbox to \vsize{\pdfimageresolution 100
\centerline{\pdfpict{cmyk.png}\qquad\pdfpict{rgb.png}}
\vfill
\centerline{\pdfpict{hsb.png}\qquad\pdfpict{paint_colors.png}}}






\bye 