Cement comes in many different forms, one of them being the Portland--or white--version. Although Portland cement has a white colour, it has no other different characteristics from ordinary grey cement. The process of mixing it into concrete is just about the same as mixing grey cement into a sandy concrete mixture. You should only choose white cement over grey cement for aesthetic purposes.
Place a wheelbarrow on an even surface.
Use a spade to put the gravel in first. Pour about six spades full of gravel.
Dump about four spades of sand into the mixture and add two spades of white cement. Keep overturning the mixture with your spade until you see an even mixture of each.
Fill a bucket with 3 to 5 litres of water. Add a small amount of water to the mixture and start sinking your spade to the bottom of the wheelbarrow, overturning the mixture continuously. Keep adding small splashes of water and mixing the concrete until you come up with a creamy mixture with the consistency of frozen ice cream. Once you have the sticky, rocky concrete mixed, you may now pour it where you wish.