Geometric frustration has been the focus of studying complex many-body interactions where exotic phenomena are widely observed. Among all systems possessing geometric frustration, artificial ice based on nanomagnets and interactive particles allows imaging individual interaction units and designing exotic frustrated lattices, which are difficult to access in traditional ice systems such as water ice and pyrochlore spin ice. However, the relatively weak interaction between nanomagnets and commonly existing quenched disorder hamper the observation of truly long-range ordered (LRO) crystalline state as well as the experimental investigation of the underlying physics. Here we report a totally new design of artificial ice based on macromagnets arranged in a geometrically frustrated kagome lattice. The unique advantage of our design is that the frustrated crystalline lattice is grown by adding the magnets into the system one by one, thus facilitating the minimization of both local and global interaction energy. As a result, an LRO ferromagnetic phase (FM-I) with charge order, as has been predicted for artificial colloidal ice, can be easily realized even in a sample with weak interactions. We also develop a magnetic comb to locally write and erase the FM-I phase at will. Moreover, a totally new ordered ferromagnetic phase (FM-II) emerges following the breakdown of FM-I phase under strong enough interactions. Our results provide unique testbed to probe the up to now elusive states in artificial ice systems.