Corocora

On 2nd chord, 3c & 4c cross to opposite sides (1,2,3x,4x)

1–

2c+3c ½ R&L (1,3,2x,4x) ; all turn P RH into allemande hold, 1c & 3c facing up, 2c & 4c facing down

9–

1c+3c Allemande starting up while 4c+2c Allemande starting down (3,1,4x,2x)

17–

All cross RSh | 3c & 2c set facing P while{2} 1W+4M & 4W+1M chase ¼ clw to lines of 4 across, 4W+1M in tandem facing 3M, 1W+4M facing 2M ; ½ RSh tandem Reels3 across & all face up/down

25–

Repeat pattern of [17–24]: all pass LSh up/down | 2c & 3c set facing down/up while{2} 1M+4W & 4M+1W chase ¼ cclw to sides facing 3M/2M ; ½ LSh tandem Reels3 on sides (3,1,4x,2x)

Longer instructions are at https://my.strathspey.org/u/murrough/Corocora.pdf