mod errors

C:\Users\Randall Serrano\Documents\Mod-powdertoy\src\elements\sprk.c||In function 'update_SPRK':|
C:\Users\Randall Serrano\Documents\Mod-powdertoy\src\elements\sprk.c|9|error: 'MERC' undeclared (first use in this function)|
C:\Users\Randall Serrano\Documents\Mod-powdertoy\src\elements\sprk.c|9|note: each undeclared identifier is reported only once for each function it appears in|
C:\Users\Randall Serrano\Documents\Mod-powdertoy\src\elements\sprk.c|9|error: 'FLRC' undeclared (first use in this function)|
C:\Users\Randall Serrano\Documents\Mod-powdertoy\src\elements\sprk.c|55|error: lvalue required as left operand of assignment|
C:\Users\Randall Serrano\Documents\Mod-powdertoy\src\elements\sprk.c|58|error: called object 'parts_change_type(i,  x,  y)' is not a function|
||=== Build finished: 5 errors, 0 warnings ===|