two simples Images

I need a graphics images format in 100x100 pixels and once in 50x50 pixel Half is to be in a star shape (offer format) and in the other half cube. This chart should then be inserted in the upper right, to a rectangular image only for understanding In the half-star form, the following text should be inserted: Oferta Especial! The font color should be white, the background color of the star should have the following color code: FF950E The graphics should be saved in GIF format, the remaining background to be transparent, ok.