[Help with printing A DESIGN]

Thank you !  very helpful

[Help with printing A DESIGN]

Please can I have advice in how to print a stamp of a lemon shape ( attached)  when I try to slice it is not slicing correctly and when trying to print it did not print hardly anything at all- I am fairly new to 3d printing. 

Lemon.stl AI3M_Lemon 1 .gcode